The U.S. National Archives YouTube channel offers a somewhat eclectic group of videos that include everything from old propaganda films like this one (also embedded below) to lectures from historians to short lessons about items in the National Archives.
LIFE Photo Timelines hosts timelines featuring images from the LIFE collections. Visitors to LIFE Photo Timelines can view existing timelines or create their own timelines using images from the LIFE collections.
Ten by Ten is a unique program that links images with news stories. Every hour the top 100 news stories from around the world are linked to images on a ten by ten grid. The stories are ranked. Clicking on an image will provide you with more information including links to more articles about the story. (You must allow pop-ups for the article links to work).