Here is a web site that started for fun making video's and now has found a way to monetize their business. You should view some of the videos, most are under 3 minutes and are used to 'explain' things.
Husband and wife started this business and it is really getting the attention of a number of people. Here is a link to a Net@Night show that Leo Laporte and Amber MacArthur produce weekly. In this show they interview one of the founders.
Check out the link below and then check out Net@Night
Common Craft - Our Product is Explanation