feedbeat.net tinkers media-RSS-feeds out of video-page-bookmarks (at present compatible to youtube, google video, vimeo, blip.tv and dailymotion) for use with media-rss-compatible video-players like democracy and such.
for people thinking of local installable tools as anachronisms, feedbeat.net also provides a web-based player (and some funky blog-gimmicks also).
this way everybody can be VJ of his very own virtual internet-tv-channel. or less euphemistic: video-playlists for the masses.