Remote Play on Jellyfin using Tailscale

[Mr_Stig]

I recently got fed up with Plex continually yanking free features and decided to set up Jellyfin, which thanks to the recent HexOS updates was a breeze.  One click install just simply worked, and since I already had folders set up for Plex, most of my stuff just showed up in Jellyfin (the naming works a little differently but that's off topic).

The main impitus for setting up Jellyfin was remote watching.  Here's the [not so detailed] steps I went through:

1. Installed Tailscale on your server through TrueNAS UI via tutorial here https://www.youtube.com/watch?v=o0Py62k63_c (thank you @sdev) - might be able to install through HexOS dash now but I did the above and it's playing nice with HexOS

     NOTE: do not include any advertised routes or the app will not launch (in my experience)

2. On the device you're watching remotely, connect to Tailscale using your server as the exit node.

3. Only other thing I had to do was when launching Jellyfin remotely, you have to add a new server using the IP of the exit node as displayed under "machines" in the Tailscale interface.  I was able to use the same port number (numbers after the colon for super noobs like me).

Of course this only works for devices that can install Tailscale, so no smart TV's that I'm aware of, but I mainly wanted this for my phone anyways.  Also Jellyfin still seems to be working out bugs with downloading files for offline watching and they don't have a download manager yet (I use VLC player to watch) but downloads were broken for years on Plex anyways.

Hope this helps someone!