"An open-source Android app to let you browse YouTube, NicoNico and BiliBili freely"
https://f-droid.org/packages/InfinityLoop1309.NewPipeEnhanced/
I get the impression PipePipe started out as a fork of NewPipe, but the two have diverged significantly since the fork. I've used variants of NewPipe to watch YouTub videos for years, with very few hassles. It's been by far the most reliable of the privacy-respecting YouTube front-ends. So I'm curious to check out PipePipe.