[YouTube]Players 643afba4 and 363db69b "break" latest nightly release (2025.03.22) with "Signature extraction failed" (on a VEVO clip)

[Vangelis66]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2021.12.17
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--ffmpeg-location', '.\\FFmpeg', '--external-downloader-args', '-v 8 -stats', '-vF', '68suo6ge38M']
[debug] Encodings: locale cp1253, fs mbcs, out cp737, pref cp1253
[debug] youtube-dl version 2025.03.22 [da7223d4a] (single file build)
[debug] ** This version was built from the latest master code at https://github.com/ytdl-org/youtube-dl.
[debug] ** For support, visit the main site.
[debug] Python 3.4.4 (CPython x86 32bit) - Windows-Vista-6.0.6003-SP2 - OpenSSL 1.0.2d 9 Jul 2015
[debug] exe versions: ffmpeg n6.1-dev-2615-N-112499-ga76b409, ffprobe n6.1-dev-2615-N-112499-ga76b409, phantomjs 2.1.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] 68suo6ge38M: Downloading webpage
[youtube] 68suo6ge38M: Downloading TVHTML5 API JSON
[debug] [youtube] Extracting signature function js_643afba4_110
[youtube] 68suo6ge38M: Downloading player 643afba4
WARNING: [youtube] 68suo6ge38M: Signature extraction failed: Some formats may be missing
[debug] [youtube] Cannot get index 4 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",)); please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output.
[debug] [youtube] Extracting signature function js_643afba4_106
ERROR: No video formats found; please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output.
Traceback (most recent call last):
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 879, in wrapper
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 975, in __extract_info
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\common.py", line 571, in extract
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\youtube.py", line 2477, in _real_extract
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\common.py", line 1558, in _sort_formats
youtube_dl.utils.ExtractorError: No video formats found; please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output.

Description

Four days ago, on Mar 21st, using nightly release 2025.03.11, I was able to fetch to disk successfully with player 69f581a5; now, having updated to the latest nightly release 2025.03.22, Google 😡 are serving me YT player 643afba4 with disastrous effects:

[debug] [youtube] Extracting signature function js_643afba4_110
[youtube] 68suo6ge38M: Downloading player 643afba4
WARNING: [youtube] 68suo6ge38M: Signature extraction failed: Some formats may be missing
[debug] [youtube] Cannot get index 4 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",));

FWIW, latest downstream release doesn't suffer from this ailment 😜 :

yt-dlp -vF "68suo6ge38M"

[debug] Command-line config: ['--ffmpeg-location', '..\\FFmpeg', '--downloader-args', 'ffmpeg:-v 8 -stats', '-vF', '68suo6ge38M']
[debug] Encodings: locale cp1253, fs utf-8, pref cp1253, out utf-8 (No VT), error utf-8 (No VT), screen utf-8 (No VT)
[debug] yt-dlp version nicolaasjan/yt-dlp@2025.03.22.092746 (win_x86_exe)
[debug] Python 3.9.13 (CPython x86 32bit) - Windows-Vista-6.0.6003-SP2 (OpenSSL 3.1.0-dev )
[debug] exe versions: ffmpeg n6.1-dev-2615-N-112499-ga76b409 (setts), ffprobe n6.1-dev-2615-N-112499-ga76b409, phantomjs 2.1.1, rtmpdump 2.4-102-ga3a600d
[debug] Optional libraries: Cryptodome-3.22.0, brotli-1.1.0, certifi-2025.01.31, mutagen-1.47.0, requests-2.32.3, sqlite3-3.37.2, urllib3-2.3.0, websockets-15.0.1
[debug] Proxy map: {}
[debug] Request Handlers: urllib, requests, websockets
[debug] Extractor Plugins: AGB+NSIG (YoutubeIE)
[debug] Plugin directories: (redacted)
[debug] Loaded 1847 extractors
[youtube+AGB+NSIG] Extracting URL: 68suo6ge38M
[youtube+AGB+NSIG] 68suo6ge38M: Downloading webpage
[youtube+AGB+NSIG] 68suo6ge38M: Downloading tv client config
[youtube+AGB+NSIG] 68suo6ge38M: Downloading player 643afba4
[youtube+AGB+NSIG] 68suo6ge38M: Downloading tv player API JSON
[youtube+AGB+NSIG] 68suo6ge38M: Downloading ios player API JSON
[debug] [youtube+AGB+NSIG] Extracting signature function js_643afba4_110
[debug] Loading youtube-sigfuncs.js_643afba4_110 from cache
[debug] Loading youtube-nsig.643afba4 from cache
[debug] [youtube+AGB+NSIG] Decrypted nsig FdX8X-sCH096gR_N => c8xsLES0zXCZhQ
[debug] Loading youtube-nsig.643afba4 from cache
[debug] [youtube+AGB+NSIG] Decrypted nsig 8-ASogrV1XVOnqfl => MgumswuV_-S_EA
[debug] [youtube+AGB+NSIG] Extracting signature function js_643afba4_106
[debug] Loading youtube-sigfuncs.js_643afba4_106 from cache
[debug] [youtube+AGB+NSIG] 68suo6ge38M: ios client https formats require a GVS PO Token which was not provided. They will be skipped as they may yield HTTP Error 403. You can manually pass a GVS PO Token for this client with --extractor-args "youtube:po_token=ios.gvs+XXX". For more information, refer to  https://github.com/yt-dlp/yt-dlp/wiki/PO-Token-Guide . To enable these broken formats anyway, pass --extractor-args "youtube:formats=missing_pot"
[youtube+AGB+NSIG] 68suo6ge38M: Downloading m3u8 information
[debug] Sort order given by extractor: quality, res, fps, hdr:12, source, vcodec, channels, acodec, lang, proto
[debug] Formats sorted by: hasvid, ie_pref, quality, res, fps, hdr:12(7), source, vcodec, channels, acodec, lang, proto, size, br, asr, vext, aext, hasaud, id
[info] Available formats for 68suo6ge38M:
ID  EXT   RESOLUTION FPS CH |   FILESIZE   TBR PROTO | VCODEC          VBR ACODEC      ABR ASR MORE INFO
--------------------------------------------------------------------------------------------------------------------
sb3 mhtml 48x27        0    |                  mhtml | images               storyboard
sb2 mhtml 80x45        0    |                  mhtml | images               storyboard
sb1 mhtml 160x90       0    |                  mhtml | images               storyboard
sb0 mhtml 320x180      0    |                  mhtml | images               storyboard
233 mp4   audio only        |                  m3u8  | audio only          unknown             Default, IOS
234 mp4   audio only        |                  m3u8  | audio only          unknown             Default, IOS
249 webm  audio only      2 |    2.53MiB   51k https | audio only          opus       51k 48k low, TV, webm_dash
250 webm  audio only      2 |    3.33MiB   68k https | audio only          opus       68k 48k low, TV, webm_dash
140 m4a   audio only      2 |    6.38MiB  129k https | audio only          mp4a.40.2  129k 44k medium, TV, m4a_dash
251 webm  audio only      2 |    6.59MiB  134k https | audio only          opus      134k 48k medium, TV, webm_dash
602 mp4   256x144     13    | ~  4.51MiB   92k m3u8  | vp09.00.10.08   92k video only          IOS
269 mp4   256x144     25    | ~  8.44MiB  171k m3u8  | avc1.4D400C    171k video only          IOS
160 mp4   256x144     25    |    5.04MiB  102k https | avc1.4d400c    102k video only          144p, TV, mp4_dash
603 mp4   256x144     25    | ~  7.96MiB  162k m3u8  | vp09.00.11.08  162k video only          IOS
278 webm  256x144     25    |    4.04MiB   82k https | vp9             82k video only          144p, TV, webm_dash
229 mp4   426x240     25    | ~ 15.35MiB  312k m3u8  | avc1.4D4015    312k video only          IOS
133 mp4   426x240     25    |   10.76MiB  219k https | avc1.4d4015    219k video only          240p, TV, mp4_dash
604 mp4   426x240     25    | ~ 13.17MiB  268k m3u8  | vp09.00.20.08  268k video only          IOS
242 webm  426x240     25    |    8.02MiB  163k https | vp9            163k video only          240p, TV, webm_dash
230 mp4   640x360     25    | ~ 39.49MiB  802k m3u8  | avc1.4D401E    802k video only          IOS
134 mp4   640x360     25    |   22.93MiB  466k https | avc1.4d401e    466k video only          360p, TV, mp4_dash
18  mp4   640x360     25  2 | ≈ 29.29MiB  595k https | avc1.42001E         mp4a.40.2       44k 360p, TV
605 mp4   640x360     25    | ~ 27.29MiB  554k m3u8  | vp09.00.21.08  554k video only          IOS
243 webm  640x360     25    |   16.03MiB  326k https | vp9            326k video only          360p, TV, webm_dash
231 mp4   854x480     25    | ~ 66.59MiB 1352k m3u8  | avc1.4D401E   1352k video only          IOS
135 mp4   854x480     25    |   35.88MiB  729k https | avc1.4d401e    729k video only          480p, TV, mp4_dash
606 mp4   854x480     25    | ~ 42.63MiB  866k m3u8  | vp09.00.30.08  866k video only          IOS
244 webm  854x480     25    |   22.85MiB  464k https | vp9            464k video only          480p, TV, webm_dash
232 mp4   1280x720    25    | ~126.60MiB 2571k m3u8  | avc1.4D401F   2571k video only          IOS
136 mp4   1280x720    25    |   94.07MiB 1911k https | avc1.4d401f   1911k video only          720p, TV, mp4_dash
609 mp4   1280x720    25    | ~ 75.21MiB 1528k m3u8  | vp09.00.31.08 1528k video only          IOS
247 webm  1280x720    25    |   44.14MiB  897k https | vp9            897k video only          720p, TV, webm_dash

[SohanTirpude]

Same here as well:

> youtube-dl -f bestvideo+bestaudio https://www.youtube.com/watch?v=uyQbyPnmfJ4 --verbose
[debug] System config: []
[debug] User config: ['--output', '~/Movies/%(title)s.%(ext)s']
[debug] Custom config: []
[debug] Command-line args: ['-f', 'bestvideo+bestaudio', 'https://www.youtube.com/watch?v=uyQbyPnmfJ4', '--verbose']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2025.03.22 [da7223d4a] (single file build)
[debug] ** This version was built from the latest master code at https://github.com/ytdl-org/youtube-dl.
[debug] ** For support, visit the main site.
[debug] Python 3.4.4 (CPython AMD64 32bit) - Windows-10-10.0.26100 - OpenSSL 1.0.2d 9 Jul 2015
[debug] exe versions: ffmpeg 2025-02-02-git-957eb2323a-full_build-www.gyan.dev, ffprobe 2025-02-02-git-957eb2323a-full_build-www.gyan.dev
[debug] Proxy map: {}
[youtube] uyQbyPnmfJ4: Downloading webpage
[youtube] uyQbyPnmfJ4: Downloading TVHTML5 API JSON
WARNING: [youtube] uyQbyPnmfJ4: Unable to decode n-parameter: expect download to be blocked or throttled (Cannot get index 0 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",)); please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output. Traceback (most recent call last):
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 680, in _index
TypeError: 'type' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\youtube.py", line 1786, in _decrypt_nsig
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\youtube.py", line 1878, in extract_nsig
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1413, in resf
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 767, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 989, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1029, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 665, in _operator
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1305, in interpret_expression
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 852, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 852, in <listcomp>
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1305, in interpret_expression
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1080, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 686, in _index
youtube_dl.jsinterp.Exception: Cannot get index 0 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",)); please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output.
)
WARNING: [youtube] uyQbyPnmfJ4: Unable to decode n-parameter: expect download to be blocked or throttled (Cannot get index 0 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",)); please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output. Traceback (most recent call last):
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 680, in _index
TypeError: 'type' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\youtube.py", line 1786, in _decrypt_nsig
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\youtube.py", line 1878, in extract_nsig
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1413, in resf
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 767, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 989, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1029, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 665, in _operator
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1305, in interpret_expression
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 852, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 852, in <listcomp>
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1305, in interpret_expression
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1080, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 686, in _index
youtube_dl.jsinterp.Exception: Cannot get index 0 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",)); please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output.
)
[debug] Invoking downloader on 'https://rr5---sn-cvh7knze.googlevideo.com/videoplayback?expire=1742923995&ei=e5TiZ5HZE7zMssUP1ua4yQk&ip=2402%3A3a80%3A4280%3Add01%3Aa07b%3Ab4d5%3Ada03%3A6496&id=o-AO5cLzZOajvyKe63fl-hVPUaHbpRsKwnhq0c_sq65l2X&itag=313&aitags=133%2C134%2C135%2C136%2C137%2C160%2C242%2C243%2C244%2C247%2C248%2C271%2C278%2C313&source=youtube&requiressl=yes&xpc=EgVo2aDSNQ%3D%3D&met=1742902395%2C&mh=6L&mm=31%2C29&mn=sn-cvh7knze%2Csn-cvhelnls&ms=au%2Crdu&mv=m&mvi=5&pl=48&rms=au%2Cau&initcwndbps=487500&bui=AccgBcMJfIOtrCZerFMQUp6mYp5oVNcqbi33qjHxIjCm5CXTA9nt6-aH6xOkXGsP0gcMOvH7rKT9pcUw&vprv=1&svpuc=1&mime=video%2Fwebm&ns=UjN2OkW_XGFLjdQ7KMfykHMQ&rqh=1&gir=yes&clen=9894795751&dur=8315.458&lmt=1714044653174224&mt=1742901924&fvip=5&keepalive=yes&lmw=1&c=TVHTML5&sefc=1&txp=630F224&n=gF0z5K3WoRVvy3Q7&sparams=expire%2Cei%2Cip%2Cid%2Caitags%2Csource%2Crequiressl%2Cxpc%2Cbui%2Cvprv%2Csvpuc%2Cmime%2Cns%2Crqh%2Cgir%2Cclen%2Cdur%2Clmt&sig=AJfQdSswRAIgWqkfvUNLj9FIAsczm2Kzxz9Lx5XwNFTPrdiGeHv2YYICIB4XhHrJG3WOU7m743Z9oz6-vUcEaxs2hC1k-2Dz7MF2&lsparams=met%2Cmh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Crms%2Cinitcwndbps&lsig=AFVRHeAwRAIgNoCMazoJb3MEY-_h5uX1tnqW-rk6BjcnAb2ksdDYyCkCIA_-dXTJRmvA6G9K3H9MbO54akdTYdbUJYOioXUiEk_A'
[dashsegments] Total fragments: 944
[download] Destination: C:\Users\test\Movies\Attakathi Full Movie in 4K _ Entertaining Malayalam Romantic Comedy Film _ J4Studios.f313.webm
[download] Got server HTTP error: HTTP Error 403: Forbidden. Retrying fragment 1 (attempt 1 of 10)...
[download] Got server HTTP error: HTTP Error 403: Forbidden. Retrying fragment 1 (attempt 2 of 10)...
[download] Got server HTTP error: HTTP Error 403: Forbidden. Retrying fragment 1 (attempt 3 of 10)...
[download] Got server HTTP error: HTTP Error 403: Forbidden. Retrying fragment 1 (attempt 4 of 10)...
[download] Got server HTTP error: HTTP Error 403: Forbidden. Retrying fragment 1 (attempt 5 of 10)...
[download] Got server HTTP error: HTTP Error 403: Forbidden. Retrying fragment 1 (attempt 6 of 10)...
[download] Got server HTTP error: HTTP Error 403: Forbidden. Retrying fragment 1 (attempt 7 of 10)...
[download] Got server HTTP error: HTTP Error 403: Forbidden. Retrying fragment 1 (attempt 8 of 10)...
[download] Got server HTTP error: HTTP Error 403: Forbidden. Retrying fragment 1 (attempt 9 of 10)...
[download] Got server HTTP error: HTTP Error 403: Forbidden. Retrying fragment 1 (attempt 10 of 10)...
ERROR: giving up after 10 fragment retries
  File "__main__.py", line 19, in <module>
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\__init__.py", line 477, in main
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\__init__.py", line 467, in _real_main
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 2258, in download
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 872, in extract_info
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 879, in wrapper
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 986, in __extract_info
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 1020, in process_ie_result
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 1864, in process_video_result
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 142, in wrapper
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 2156, in process_info
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 2092, in dl
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\downloader\common.py", line 380, in download
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\downloader\dash.py", line 78, in real_download
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\downloader\common.py", line 175, in report_error
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 682, in report_error
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 634, in trouble
>

[dirkf]

There is a fix for 643afba4 but I see that 363db69b causes an error, so a bit more work is needed. And also apparently the simulation of JS Array by Python list has never been presented with an assignment to a non-existent index.

[Vangelis66]

but I see that 363db69b causes an error

... Yes, today I got served that one myself, resulting in a similar verbose log as the previous one for player 643afba4:

yt-dl -vF "68suo6ge38M"

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--ffmpeg-location', '.\\FFmpeg', '--external-downloader-args', '-v 8 -stats', '-vF', '68suo6ge38M']
[debug] Encodings: locale cp1253, fs mbcs, out cp737, pref cp1253
[debug] youtube-dl version 2025.03.22 [da7223d4a] (single file build)
[debug] ** This version was built from the latest master code at https://github.com/ytdl-org/youtube-dl.
[debug] ** For support, visit the main site.
[debug] Python 3.4.4 (CPython x86 32bit) - Windows-Vista-6.0.6003-SP2 - OpenSSL 1.0.2d 9 Jul 2015
[debug] exe versions: ffmpeg n6.1-dev-2615-N-112499-ga76b409, ffprobe n6.1-dev-2615-N-112499-ga76b409, phantomjs 2.1.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] 68suo6ge38M: Downloading webpage
[youtube] 68suo6ge38M: Downloading TVHTML5 API JSON
[debug] [youtube] Extracting signature function js_363db69b_107
[youtube] 68suo6ge38M: Downloading player 363db69b
WARNING: [youtube] 68suo6ge38M: Signature extraction failed: Some formats may be missing
[debug] [youtube] Cannot get index 4 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",)); please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output.
[debug] [youtube] Extracting signature function js_363db69b_103
ERROR: No video formats found; please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output.
Traceback (most recent call last):
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 879, in wrapper
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\YoutubeDL.py", line 975, in __extract_info
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\common.py", line 571, in extract
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\youtube.py", line 2477, in _real_extract
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\common.py", line 1558, in _sort_formats
youtube_dl.utils.ExtractorError: No video formats found; please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output.

I will edit the title of this issue to also include player 363db69b ... FWIW, my sample videoID is for a "VEVO" clip, which appears to be "additionally" protected; as a result, yt-dl doesn't even get to the list of formats when -F is issued, whereas it does for the videoID posted above by @SohanTirpude:

yt-dl -vF "uyQbyPnmfJ4"

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--ffmpeg-location', '.\\FFmpeg', '--external-downloader-args', '-v 8 -stats', '-vF', 'uyQbyPnmfJ4']
[debug] Encodings: locale cp1253, fs mbcs, out cp737, pref cp1253
[debug] youtube-dl version 2025.03.22 [da7223d4a] (single file build)
[debug] ** This version was built from the latest master code at https://github.com/ytdl-org/youtube-dl.
[debug] ** For support, visit the main site.
[debug] Python 3.4.4 (CPython x86 32bit) - Windows-Vista-6.0.6003-SP2 - OpenSSL 1.0.2d 9 Jul 2015
[debug] exe versions: ffmpeg n6.1-dev-2615-N-112499-ga76b409, ffprobe n6.1-dev-2615-N-112499-ga76b409, phantomjs 2.1.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] uyQbyPnmfJ4: Downloading webpage
[youtube] uyQbyPnmfJ4: Downloading TVHTML5 API JSON
WARNING: [youtube] uyQbyPnmfJ4: Unable to decode n-parameter: expect download to be blocked or throttled (Cannot get index 0 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",)); please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output. Traceback (most recent call last):
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 680, in _index
TypeError: 'type' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\youtube.py", line 1786, in _decrypt_nsig
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\youtube.py", line 1878, in extract_nsig
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1413, in resf
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 767, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 989, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1029, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 665, in _operator
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1305, in interpret_expression
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 852, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 852, in <listcomp>
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1305, in interpret_expression
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1080, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 686, in _index
youtube_dl.jsinterp.Exception: Cannot get index 0 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",)); please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output.
)
WARNING: [youtube] uyQbyPnmfJ4: Unable to decode n-parameter: expect download to be blocked or throttled (Cannot get index 0 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",)); please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output. Traceback (most recent call last):
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 680, in _index
TypeError: 'type' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\youtube.py", line 1786, in _decrypt_nsig
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\extractor\youtube.py", line 1878, in extract_nsig
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1413, in resf
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 767, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 989, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1029, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 665, in _operator
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1305, in interpret_expression
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 852, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 852, in <listcomp>
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1305, in interpret_expression
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 382, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 1080, in interpret_statement
  File "D:\a\ytdl-nightly\ytdl-nightly\youtube_dl\jsinterp.py", line 686, in _index
youtube_dl.jsinterp.Exception: Cannot get index 0 in: "<class 'youtube_dl.jsinterp.JS_Undefined'>" (caused by TypeError("'type' object is not subscriptable",)); please report this issue on https://github.com/ytdl-org/youtube-dl/issues , using the appropriate issue template. Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose option and include the complete output.
)
[info] Available formats for uyQbyPnmfJ4:
format code  extension  resolution note
249          webm       audio only audio_quality_low   52k , webm_dash container, opus  (48000Hz), 51.63MiB
249-drc      webm       audio only audio_quality_low   52k , webm_dash container, opus  (48000Hz), 51.73MiB
250          webm       audio only audio_quality_low   67k , webm_dash container, opus  (48000Hz), 66.62MiB
250-drc      webm       audio only audio_quality_low   67k , webm_dash container, opus  (48000Hz), 66.77MiB
140          m4a        audio only audio_quality_medium  129k , m4a_dash container, mp4a.40.2 (44100Hz), 128.34MiB
140-drc      m4a        audio only audio_quality_medium  129k , m4a_dash container, mp4a.40.2 (44100Hz), 128.34MiB
251          webm       audio only audio_quality_medium  129k , webm_dash container, opus  (48000Hz), 128.43MiB
251-drc      webm       audio only audio_quality_medium  129k , webm_dash container, opus  (48000Hz), 128.69MiB
160          mp4        256x144    144p   95k , mp4_dash container, avc1.4d400c, 24fps, video only, 95.08MiB
278          webm       256x144    144p   96k , webm_dash container, vp9, 24fps, video only, 95.63MiB
242          webm       426x240    240p  183k , webm_dash container, vp9, 24fps, video only, 181.42MiB
133          mp4        426x240    240p  215k , mp4_dash container, avc1.4d4015, 24fps, video only, 213.49MiB
243          webm       640x360    360p  305k , webm_dash container, vp9, 24fps, video only, 303.32MiB
134          mp4        640x360    360p  446k , mp4_dash container, avc1.4d401e, 24fps, video only, 442.76MiB
244          webm       854x480    480p  508k , webm_dash container, vp9, 24fps, video only, 504.04MiB
135          mp4        854x480    480p  918k , mp4_dash container, avc1.4d401e, 24fps, video only, 910.81MiB
247          webm       1280x720   720p  873k , webm_dash container, vp9, 24fps, video only, 865.70MiB
136          mp4        1280x720   720p 1796k , mp4_dash container, avc1.64001f, 24fps, video only, 1.74GiB
248          webm       1920x1080  1080p 1441k , webm_dash container, vp9, 24fps, video only, 1.40GiB
137          mp4        1920x1080  1080p 3555k , mp4_dash container, avc1.640028, 24fps, video only, 3.44GiB
271          webm       2560x1440  1440p 5192k , webm_dash container, vp9, 24fps, video only, 5.03GiB
313          webm       3840x2160  2160p 9519k , webm_dash container, vp9, 24fps, video only, 9.22GiB
18           mp4        640x360    360p  603k , avc1.42001E, 24fps, mp4a.40.2 (44100Hz), 597.83MiB (best)

[dirkf]

The first one failed in the old signature processing; the second in the nsig processing, where originally extraction wasn't fatal.

[dirkf]

These two had 363db69b but 4fcd6e4a is also working:

$ python -m youtube_dl -vF uyQbyPnmfJ4
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-vF', u'uyQbyPnmfJ4']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2021.12.17
[debug] Git HEAD: 2b4fbfce2
[debug] Python 2.7.15 (CPython i686 32bit) - Linux-6.1.0-32-686-pae-i686-with-debian-12.10 - OpenSSL 1.1.1a  20 Nov 2018 - glibc 2.1.3
[debug] exe versions: ffmpeg 5.1.6-0, ffprobe 5.1.6-0
[debug] Proxy map: {}
[youtube] uyQbyPnmfJ4: Downloading webpage
[youtube] uyQbyPnmfJ4: Downloading TVHTML5 API JSON
[youtube] uyQbyPnmfJ4: Downloading player 363db69b
[debug] [youtube] Decrypted nsig j4jDrllVA-Ly71jOc => hM513ws7iru-UQ
[debug] [youtube] Decrypted nsig TRbiz4yk9HXfevqk3 => qGtt1dLW4-9lig
[info] Available formats for uyQbyPnmfJ4:
format code  extension  resolution note
249          webm       audio only audio_quality_low   52k , webm_dash container, opus  (48000Hz), 51.63MiB
249-drc      webm       audio only audio_quality_low   52k , webm_dash container, opus  (48000Hz), 51.73MiB
250          webm       audio only audio_quality_low   67k , webm_dash container, opus  (48000Hz), 66.62MiB
250-drc      webm       audio only audio_quality_low   67k , webm_dash container, opus  (48000Hz), 66.77MiB
140          m4a        audio only audio_quality_medium  129k , m4a_dash container, mp4a.40.2 (44100Hz), 128.34MiB
140-drc      m4a        audio only audio_quality_medium  129k , m4a_dash container, mp4a.40.2 (44100Hz), 128.34MiB
251          webm       audio only audio_quality_medium  129k , webm_dash container, opus  (48000Hz), 128.43MiB
251-drc      webm       audio only audio_quality_medium  129k , webm_dash container, opus  (48000Hz), 128.69MiB
160          mp4        256x144    144p   95k , mp4_dash container, avc1.4d400c, 24fps, video only, 95.08MiB
278          webm       256x144    144p   96k , webm_dash container, vp9, 24fps, video only, 95.63MiB
242          webm       426x240    240p  183k , webm_dash container, vp9, 24fps, video only, 181.42MiB
133          mp4        426x240    240p  215k , mp4_dash container, avc1.4d4015, 24fps, video only, 213.49MiB
243          webm       640x360    360p  305k , webm_dash container, vp9, 24fps, video only, 303.32MiB
134          mp4        640x360    360p  446k , mp4_dash container, avc1.4d401e, 24fps, video only, 442.76MiB
244          webm       854x480    480p  508k , webm_dash container, vp9, 24fps, video only, 504.04MiB
135          mp4        854x480    480p  918k , mp4_dash container, avc1.4d401e, 24fps, video only, 910.81MiB
247          webm       1280x720   720p  873k , webm_dash container, vp9, 24fps, video only, 865.70MiB
136          mp4        1280x720   720p 1796k , mp4_dash container, avc1.64001f, 24fps, video only, 1.74GiB
248          webm       1920x1080  1080p 1441k , webm_dash container, vp9, 24fps, video only, 1.40GiB
137          mp4        1920x1080  1080p 3555k , mp4_dash container, avc1.640028, 24fps, video only, 3.44GiB
271          webm       2560x1440  1440p 5192k , webm_dash container, vp9, 24fps, video only, 5.03GiB
313          webm       3840x2160  2160p 9519k , webm_dash container, vp9, 24fps, video only, 9.22GiB
18           mp4        640x360    360p  603k , avc1.42001E, 24fps, mp4a.40.2 (44100Hz), 597.83MiB (best)
$ python -m youtube_dl -vF 68suo6ge38M
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-vF', u'68suo6ge38M']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2021.12.17
[debug] Git HEAD: 2b4fbfce2
[debug] Python 2.7.15 (CPython i686 32bit) - Linux-6.1.0-32-686-pae-i686-with-debian-12.10 - OpenSSL 1.1.1a  20 Nov 2018 - glibc 2.1.3
[debug] exe versions: ffmpeg 5.1.6-0, ffprobe 5.1.6-0
[debug] Proxy map: {}
[youtube] 68suo6ge38M: Downloading webpage
[youtube] 68suo6ge38M: Downloading TVHTML5 API JSON
[debug] [youtube] Extracting signature function js_363db69b_107
[debug] [youtube] Decrypted nsig FKCVTx8OSaiH3KjTS => uhIUtipxnHPn1w
[debug] [youtube] Decrypted nsig N2qR4EnZ1KVsi6fQU => tRf8EFlzkyjARw
[debug] [youtube] Extracting signature function js_363db69b_103
[info] Available formats for 68suo6ge38M:
format code  extension  resolution note
249          webm       audio only audio_quality_low   51k , webm_dash container, opus  (48000Hz), 2.53MiB
250          webm       audio only audio_quality_low   67k , webm_dash container, opus  (48000Hz), 3.33MiB
140          m4a        audio only audio_quality_medium  129k , m4a_dash container, mp4a.40.2 (44100Hz), 6.38MiB
251          webm       audio only audio_quality_medium  133k , webm_dash container, opus  (48000Hz), 6.59MiB
278          webm       256x144    144p   82k , webm_dash container, vp9, 25fps, video only, 4.04MiB
160          mp4        256x144    144p  102k , mp4_dash container, avc1.4d400c, 25fps, video only, 5.04MiB
242          webm       426x240    240p  162k , webm_dash container, vp9, 25fps, video only, 8.02MiB
133          mp4        426x240    240p  218k , mp4_dash container, avc1.4d4015, 25fps, video only, 10.76MiB
243          webm       640x360    360p  325k , webm_dash container, vp9, 25fps, video only, 16.03MiB
134          mp4        640x360    360p  465k , mp4_dash container, avc1.4d401e, 25fps, video only, 22.93MiB
244          webm       854x480    480p  464k , webm_dash container, vp9, 25fps, video only, 22.85MiB
135          mp4        854x480    480p  728k , mp4_dash container, avc1.4d401e, 25fps, video only, 35.88MiB
247          webm       1280x720   720p  896k , webm_dash container, vp9, 25fps, video only, 44.14MiB
136          mp4        1280x720   720p 1910k , mp4_dash container, avc1.4d401f, 25fps, video only, 94.07MiB
18           mp4        640x360    360p  594k , avc1.42001E, 25fps, mp4a.40.2 (44100Hz) (best)
$ 

If one of the supposedly supported players plays up, try --no-cache-dir in case corrupt cached data from the player is the cause. If so, either use --rm-cache-dir next time, or manually delete the problem file from the cache.

[dirkf]

Closed in b982d77.