Jellyfin is nice but I could never understand how to setup when all I wanted was to watch videos from server for example.
So I used copyparty[0] and used VLC and set a username and password.
I recommend copyparty if you just want something quick and easy actually. Just try it out on cheap VPS and just run it and forget it.
Jellyfin isn't a simple viewer over a filesystem, you have to make a library and give it folders to ingest. It enforces an artist-album-track structure of media, so if you don't like that structure you'll be fighting Jellyfin more than using it.
The big thing is being able to stream outside of my home network. Running stuff locally is easy enough with basically any system luckily
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