How do I access local host on other devices?

[naeco]

Did you allow Jellyfin through your server's firewall?  I am assuming the server is running on a Windows machine.  During the end of the install process, did it prompt you to add a firewall rule?  If not, manually open port 8096 or manually add jellyfin.exe to the allow list.

You're right! It works!

Thank you!
I can now see a lot of things that I can play around.