Recently youtube changed a few things and everything was breaking for me NewPipe, Freetube, yt-dlp. NewPipe and Freetube immediately released updates. Yt-dlp also got updated but this time there is a change. Earlier you can simply download 1080p videos in one go. Now I have to download 1080 video and corresponding audio separately and use a FFMEG command to merge them. Though it’s a pain, I’m still thankful that yt-dlp works.
https://www.ncesc.com/gaming-faq/what-is-denuvo-and-why-does-everyone-hate-it/ This article explains a lot of things in a short manner. Hope it helps.