The Mysteries of Vernacular video series explains the origin of words through fancy book animations. I don’t know why this doesn’t have a ba-jillion views (I have a very sophisticated understanding of numerical value).
Here’s one on the origins of hearse:
http://vimeo.com/40333422
Wolf car. Just for fun and because they’re so GAF (definition here) and gorgeous, here are some my favorite hearses from around the world.
Hat tip to Mike Verdone & Hannah Lowe