This is interesting. The creators of this site have taken TED videos, associated time stamps with them, and associated Wikipedia pages with the time stamps. The list of pages is displayed as a set of icons below the video. You can use their 'nibs' or you can add nibs of your own. It does make videos - especially talking head videos - more interesting. I spent twenty minutes watching the Tierney Thys presentation on oceans. Via Maria Droujkova, on the WikiEducators mailing list.