Video controls do not properly resize on small screen resolutions

[rtibbles]

Noticed the following issue with the video player where in resolutions less than 530 px the video player's controls don't shrink properly. I observed this in the Android app too so not a browser glitch:

video.player.18.mp4

Here's the behavior in 0.17.5:

video.player.17.mp4

Let me know if it's not in scope for this PR and I will open a follow-up.

Originally posted by @pcenov in #13327 (comment)

[rtibbles]

Fixed in #13336