Very cool idea!
I definitely would be using this.
I don’t know about the voting though, some devices have so many use cases that the “usefulness” of a video can be very subjective. Most of these videos will be probably from YouTube, so this would be a kind of strange double rating system and might lead to some people not ever watching the least voted videos even if they’re perfectly good.
Maybe this guide could be a place where even the tiny new creators could have their videos next to the bigger ones without being buried by the algorithm?
Just my two cents.