Install the Jellyfin app and connect

1. Install the Jellyfin app on the phone, tablet or TV. It's free from the device's app store; jellyfin.org/downloads lists them. Any web browser works too.
2. In Reelhost, open Connect devices. Scan the QR code with a phone, or type the address it shows.
3. In the app, choose Add server, enter the address, then sign in.

With Server discovery turned off (Emby on the same computer), apps won't find Jellyfin by themselves. Type the address once on each device.