I'm not sure if it's related but I've been having a hard time playing videos through NewPipe lately. They just load very slow.

What device are you wanting this for? If Android, I just stumbled upon ViMusic which looks like what you're lookinh for.

https://f-droid.org/en/packages/it.vfsfitvnm.vimusic/

Boilr was a good one for me. I like keeping my library pretty with full game art.