According to the New York Times, the upcoming Yahoo television search will have actual video.

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Today, Yahoo will move the video search to its home page. In the next few weeks, it will introduce the ability to search the closed-captioning text for programs from some networks, including Bloomberg and the BBC. Unlike the Google service, Yahoo's offering will let users watch 60-second video clips.
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http://www.nytimes.com/2005/01/25/technology/25google.html