mr. rosenstein, what's new about youtube? >> guest: what's new, so we're here talking about content id. this is one of the pieces of our rights management solution that allows content owners to provide a set of reference files, essentially, you know, music labels, movie studios, the studios to provide reference files into youtube. we identify it as, we generate video fingerprints, audio fingerprints, and we use this when user videos are uploaded, and we get something like 35 hours of user-generated video every minute. so each one of those user-generated videos is scanned against this entire reference of content files, and we will apply the policy that the rights holder tells us to apply. they can tell us at a simple level block this, um, leave it be, just track it -- >> host: because it's copyrighted or something like that? >> guest: sure, exactly. it's their content, they can tell us to do whatever they would choose. these days, though, most of the customers are telling us to monetize the videos. well, if a user uploads content and they use my content, i'm okay with that, but i'd like