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.
Unlikely, Dolby tech support requires that the license for Vision or Atmos etc has been bought for that particular machine. Never seen a media player where the end user can buy the license separately.
edit: Also those Android boxes only support DV Profile 5, which is DV used for streaming, If you want to play a UHD BluRay rip in mkv format in the highest quality DV profile, Profile 7 with Full Enhancement Layers, you need to find a Oppo 203 or 205 or one of the clones. Those are basically the only players that can play UHD BD mkv with DV Profile 7 FEL.