That is just what Jan Snyder at Oregon City School District has done. Using Destiny's Visual Search feature, Jan has added trailers from the internet for both middle school and high school students. She locates the trailers on YouTube, and then runs the video through SafeTV to strip out advertising. Then she posts the file as a Visual Search along with an image of the book for students to find in their Destiny catalog. The trailers can be added as a digital resouces to your MARC records in Destiny, too.
You can see more on how Jan does it by going to her Book Trailer folder. Visit her Visual Search Book Trailers at her online Destiny catalogs.