I cant wrap my head around using Git for this...

My sweet spot has been Plex + Plexamp. I have a truenas server and created a 'media' nfs share for my Plex instance. I've been a very happy camper with this set up for the past 3 years. I can expand my storage at any time, ZFS is very powerful and gives me some backup options. Plex effectively replaces all my streaming service needs.