Search engine for research videos

As regular readers will know, video and audio aren’t usually my media — I’m a ‘words on the page’ kind of person. However, today I discovered an "academic" video search engine: at the link below you can find links to "top tens" of history channel, biography, Harvard computer science, NOVA, NASA and A&E TV videos, and loads of others. You can search by other categories, such as music, sports, comedy and so on, but the "research video" search engine is kind of appealing. Apparently there will shortly be an education channel.

Link: Research Videos, MTV, Yahoo Research, Mp3, Download Research – Search Video, Downloads, Windows Media, Quicktime, YouTube, MySpace, Google Video PureVideo Video and Multimedia Search Engine.