NewPipe

PipePipe

https://poster.place does it for you automatically in th AI Chat, paste link and choose video or music

Screen record.

This works for YouTube, Twitter, Reddit, Facebook https://apps.apple.com/ca/app/video-saver-pro-player/id6446137141

NewPipe and MeTube on Umbrel

https://stacher.io/

Since NewPipe and forks were already mentioned: you also have yt-dlp.

Slopped up a bash script.

YouTube to MP4 converter. Just make sure that it's the right one because there's a hundred fake versions of that website and they all give you viruses amd steal your banking information