Tried attaching an ARM SBC with Librelec but the state of the Youtube apps are extremely broken in a way that you need api keys from a google cloud account and that allows you to only play videos. Your subscriptions and everything are not imported. PS4 runs fine but I don't want to run a 100W console to watch YT videos.
Meanwhile I've found out that most of my favorite channels (mostly tech and retro stuff) are also uploading to Odyssey as a sort of backup strategy. That works very well for me.