#19 Podcasts, video and E-books.
I looked at a Social Video and Sharing site, Sevenload, in Web 2.00. It seemed very trivial because I can't remember what it showed now. In YouTube Home I looked at a clip from a tribute to Miriam Makemba and noticed that access to related videos is available. Searched for, found and viewed clips from "Tin Drum" and "Blackadder in Videos and looked very briefly at Channels. In YouTube Community I chose the "38 Ghosts" nine inch nails ghosts film festival and am none the wiser after viewing it.
Had quick look at Yahoo and VideosGoogle but didn't find them interesting enough to spend time on.
Right now I can't think of any features exclusive to YouTube and co that could be used on library websites