The following video was prepared by Dorling Kindersley Books for a sales conference. It was such a hit internally that it was shared via YouTube. In 9 months, it's had over 645,000 views. Be sure to watch the first two minutes. There's a neat surprise in the middle.
Again, this is a video that would be easy to recreate for any idea, book, website, or product. It would be very easy to create the video, a little harder to write something as clever as the script for this video.