This could be a category on Google Video or Youtube that only brings up results that make sense auditorily. Or maybe a checkbox under the search box that limits searches to described video or video that has a significant audio component. Only about 10% of the top 100 on GV make sense if you can't see the video. Searching GV and YT randomly is frustrating for people who already have a number of bariers in their way. Examples of Accessible Videos on GV and YT are:
-- JesusHChrist, Oct 29 2006

Accessible -- Vomit on Live TV http://video.google...69419&q=vomit&hl=en
[JesusHChrist, Oct 29 2006]

Accessible -- Letterman http://video.google...2&q=letterman&hl=en
[JesusHChrist, Oct 29 2006]

Accessible -- Sam Magee on Youtube http://www.youtube....watch?v=6lBkuz1TlVc
[JesusHChrist, Oct 29 2006]

Not Accessible -- running lady http://video.google...=507732229697832036
[JesusHChrist, Oct 29 2006]

random, halfbakery