I am pretty sure they have considered it. Probably there is a legal hiccup laying here -- you either have reasonable suspicion that the material you show is cop

I am pretty sure they have considered it. Probably there is a legal hiccup laying here -- you either have reasonable suspicion that the material you show is copyrighted, or you acknowledge your algorithms and AI suck and you require crowd-sourcing. Kind of a lose-lose legally, and they would possibly introduce liability. Recall the goal of Google is to avoid liability via the statement "we are pretty good and have really low false negatives", and have as few false positives as not to make the platform unusable. Google does not care about content creators or propagation of knowledge (instructive videos) and ideas. Simple statement here. Google engineers might (at least the friends I have), but not as a whole organization. But yeah crowd-sourcing is a good way to do a second sifting through results. I know it is being used, by Google and others, already to classify video sources.