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.
Couldn’t you get around this by making the “apps” in bigscreen be browser shortcuts to their respective streaming website?
Many streaming service websites limit browser streaming to 720p.