What is your no-brainer idea?
PS: I am a 2-time entrepreneur with 1 small exit and a reasonably successful product startup.
To put it another way, you're competing with Dollar Tree's one dollar duct tape, tortillas, and spatulas.
Anyone who sends videos to a read-later service like that - rather than using the service-specific version, like YouTube's own "Watch Later" list - would then be able to watch those videos on Apple TV. Basically, a media-only RSS reader (player) for tvOS.
(This would also work for YouTube's own RSS feeds and any others, but I don't see use cases for those.)