I just saw some spam posts about a Youtube downloader, so I figured I'd share a better one that is open source.
yt-dlp - Command line tool, and a fork of youtube-dl. Supports many sites. Can download playlists, entire channels, convert to mp3, and more
yt-dlg - Graphical interface for yt-dlp, if you don't want to mess with the command line.
there doesn't seem to be anything here