I believe ContentID only detects videos registered in their database by partners through what they call the "CMS". Basically you upload your videos, and meta d

I believe ContentID only detects videos registered in their database by partners through what they call the "CMS". Basically you upload your videos, and meta data for what they call reference files. Which I doubt are publically viewable. https://support.google.com/youtube/answer/3244015?hl=en https://support.google.com/youtube/answer/3244015?hl=en Plus if it automatically matched videos already uploaded would cause a mess because so many channels use royalty free music or content library... So then everyone would claim they own music they don't really own.