Description:Thumbnails are becoming pervasive on search results pages of Google, Ask, Yahoo! and on many customized search pages. Thumbnails had been mostly the domain of image search -- look up a celebrity under the image category and there's the photo. Well, it turns out that thumbnails have become a powerful way to drive traffic to video clips. This is clearly demonstrated by Google Video's recent introduction of related thumbnails across the top of video player pages. (3:42)