Navify is a mashup of Wikipedia, Flickr, and YouTube. Navify attempts to match videos and images to Wikipedia articles. To use Navify, simply enter a search term just as you would on Wikipedia. The results of your search will be shown in a three tab display of Wikipedia article, related images, and related videos. The screen capture below is from my search for US Civil War.

Applications for Education
What I like about this type of Wikipedia and video mashup is that it provides a second or third option for students to get engaged in learning. A student that struggles as a reader can still get engaged in an article through the corresponding videos and images.