what.cd did it just fine for music and that was a tiny community. There are a several longstanding open projects out there to compile metadata databases that a

what.cd did it just fine for music and that was a tiny community. There are a several longstanding open projects out there to compile metadata databases that are free to use like: https://musicbrainz.org/statistics https://musicbrainz.org/statistics (33 million tracks) Music is less than 100 million items, Movies fewer than 1 million, TV somewhere in between and books are a few hundred million. I'm sure they all have mostly-complete metadata databases available already.