I agree. While I like that YouTube EDU has lots of classes, it just doesn't match Academic Earth for the organization. YouTube EDU seems to rely more on search, but Academic Earth has a well-structured taxonomy that makes more sense to me in an academic setting. With more sites out there like this, this should only increase the bar so that we end up with better resources.
Yea I have thought about writing an aggrigator, but video isn't like a webpage, it might be hard to index the videos. After that they all have there own way of embedding. Also they all have there own way of determing if something is good or bad. I don't know seems like things need to converge a bit more. Or someone needs to figure out the backdoor.
Google Video as a search engine for videos never gained habitual use. That's a wide open market.