I’ve tested jellyfin this week on my dedicated server. It’s cool but most of my files need transcoding to be played on the browser, which my weak server CPU cannot handle. The best option I found to stream any file format without eating up all server resources on this machine is to set up a simple nginx server with autoindex streaming the files to VLC. I use the “Open with VLC” browser extension to quickly open the links. Playback performance is quite good (scrubbing is fast) and everything plays well.