Google continue with their mission to organise all the worlds information with Google Video.
Currently a Beta release, it searches through the text descriptions and closed captioning of videos in googles archives for words or terms that you search for.
Some are viewable (although you need to install Google's free viewing software), and with other videos you can just read the captions/subtitles. You can even apply for videos that you have created to be added.
Theres aren't huge numbers of videos on there yet, but as it grows Google Video may prove to be an interesting way to search for more obscure items.