Revert 'chore(mcp): add mcp demo mp4 (Canner#1119)'

This reverts commit 348fcca.

Author: douenergy

README.md

@@ -66,8 +66,6 @@ Check our full article
 ## 🚀 Get Started with MCP 
 [MCP Server README](mcp-server/README.md)
 
-<video src="https://github.com/Canner/wren-engine/raw/main/misc/local-mcp-demo.mp4" controls="controls" style="max-width: 730px;">
-</video>
 
 ## 🤔 Concepts