We are aware that Youtube is broken for some people, as Google has changed their code again. This time, it's quite a drastic change and so it may take a while for Youtube.js and FastStream to be fixed.

Related bug reports:

• [Edge] [YOUTUBEJS][Player]: Failed to extract signature decipher algorithm LuanRT/YouTube.js#1043
• [Announcement] Upcoming new requirements for YouTube downloads yt-dlp/yt-dlp#14404