Comment by muzani

I would love to know how YouTube does this for music. There's some holes obviously, like some cover artists will play the iconic riffs of a song and then stop somewhere. There's people who do reels or "commentary" of a movie scene and then put some horrible high pitched music to mask it from copyright.

There's probably even some rules around this to only detect just enough to take legal action. Like GP stumbled on a trademark landmine, but obviously just selling red shirts with a bird on it can't be a trademark violation; it needs to be a specific kind of red too.