Videosurf is a new video search engine that has somehow managed to design a better video search site than Youtube while getting permission from Youtube to use their entire database as well as the databases of other sites. The interface is even more Google-y than Youtube -- it lets you refine the search by video length and other information, and offers little thumbnail snippets that are automatically chosen to give you a sense of the different parts of the video. (It's doing image processing on the video to find the most relevant parts and to learn more about the content) You can click the snippets to jump directly to the relevant part of the video, which allows you to deal with those annoying videos where nothing happens for the first minute or two.
Check it out:
videosurf.com