Not exactly self-hosted but I know many jellyfinners here would cherish this as well.
KDE's Android TV alternative, Plasma Bigscreen, rises from the dead with a better UI
www.neowin.netAnother KDE project, Plasma Bigscreen, is back from the dead with a much better UI spread across the entire shell.
Baeically its a somewhat stripped down version of plasma ment to be used with a controller or remote, but it is only a DE, so applications that arent controller friendly are going to stay that way.
Setting steam to launch big picture by default tho would basically turn any powerful pc you have into a steam console (steam big picture) with an extra home screen (plasma bigscreen) that shows all your other applications
I wonder if you could eventually get it built into Bazzite