YouTube's definition of copyright infringement is "someone claims it is". That's literally it, they are not actually checking the potential infringement (neithe

YouTube's definition of copyright infringement is "someone claims it is". That's literally it, they are not actually checking the potential infringement (neither claim to do it for that matter). There are repercussions for failing to take action after a valid claim but none for taking action after a bogus claim. So there is an incentive to take material down fast after any claim but no incentive for due diligence and claim validation before or after the takedown.