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.

There are multiple mailing lists you can subscribe to. Here is a good list of them. It's really not too advanced though.

https://puck.nether.net/mailman/listinfo

I subscribe to this outages mailing list and get emails when major outages occur.
https://puck.nether.net/mailman/listinfo/outages

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/

Not using it, but Bookstack looked real nice for a documentation site.

We're using a different wiki at the moment for it.

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