“After attracting millions of eyeballs with video clips of dancing cats and lip-syncing coeds, YouTube hopes to cash in on its popularity with online infomercials. Starting today, the video-sharing site plans to let advertisers create ‘channels’ filled with clips they produce themselves — and then in turn sell sponsorships to other advertisers. Among the first: a channel created by Warner Bros. Records devoted to Paris Hilton’s new album…. Fox Broadcasting Co. will advertise on the Paris Hilton Channel to promote the fall season of the television show ‘Prison Break.'”