For this reason the Open Video Alliance is launching a mass campaign to bring video to Wikipedia. The central site for the project is Let's Get Video on Wikipedia, featuring a tutorial on how to post videos to Wikipedia as well as a gallery of some of the recently posted videos.
There's also good news for those who were struggling to convert videos to Theora, which is the open video format used by Wikipedia. The makers of Miro are testing a free utility for converting videos to Theora; it's not ready for launch yet, but it will be very soon. From its blog post:
"Shhhhh. If you look around that site, you’ll notice a reference to a new Miro product that is in a usable beta form but not quite ready for a full launch. Look for a launch announcement very soon."