Teresa Schauer, a District Librarian, in Pettus, Texas has been working on her site: Booktrailers For All. Her newest tweak is a search feature that makes it easier to find the clip you are looking for.
"With the search page, users are now able to search for book trailers by title, author, interest level, trailer creator, software used in trailer creation, and subject keywords. Each entry includes a summary, information about the trailer creator, subject words, and links to the three sites where the trailers are housed: 4shared, You Tube, and Teacher Tube."
To try it out, go to http://booktrailersforall.com and click on the "Search" tab at the top.