NewPipe stopped working for me two weeks ago, and it seems like Google won't allow NewPipe to download Youtube's content for free anymore. I don't think Youtube/NewPipe will ever be usable again. I think we have to say goodbye to Youtube.
Good suggestions but most of the time I can't get any of these apps to work, some commenters here say differently but for me, due to YouTube's policy of "sign in to prove you're not a bot", I end up using a tor browser with cookies denied and sadly all the bullshit yt advertising of course.