I’m using TeamSpeak. It is very good and feature rich, but it’s important to note that video / screen sharing works only P2P in a moment, so no server processing. It’s probably ok if you don’t have more than 3 people in a party, but still worth noting.

I also tried Matrix + Element + Jitsi. Can’t recommend.

If you’re ok with Plex, then you’ll be ok with Jellyfin

And we also have metadata manager, so you don’t have to rename your TV show files every time!