YouTube announced to is U.S. partners today that it has recently rolled out its content rating system to all U.S. partner-uploaded content, and giving away a prize to the first ten partners that add ratings to all of their content by the end of July. "Now, when you upload a video that does not have a specified content rating (i.e. MPAA or TV rating), we ask that the partner rate content in these five categories: Language, Nudity, Sexual Situations, Violence and Drug Use.