Nvidia Shield. The regular version is $150 US and from what I understand it gives flawless playback. I have the pro version which is more powerful, but that’s specifically for running games.

It’s Android TV OS, so app selection is great. You can load Smart Tube Next on there to get YouTube without ads, and there’s a very solid Jellyfin app. You can also use Kodi for local direct playback. Remote is perfectly functional, and you can use an app to rebind most of the keys.