These days I watch 90% of YouTube videos with NewPipe, an open source YouTube app for android. It's 10x better than the original app!
You can watch/listen videos in the background and even subscribe to channels and create playlists without having an account.
Highly recommend! It's available via F-Droid.
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!