Merge branch 'master' of https://github.com/yt-dlp/yt-dlp into ytdlp

* 'master' of https://github.com/yt-dlp/yt-dlp:
  [reddit] Prevent infinite loop
  [youtube] De-prioritize auto-generated thumbnails
  [cleanup] Misc fixes
  [doc] Minor improvements
  [build] Fix `--onedir` on macOS