Google has taken their ad network to the next level, a level the founders probably would never have thought they would have taken it when they first started the Google AdWords program. They have announced the testing of Google AdWords Click-to-play video ads. You got that right, they will be allowing AdWords advertisers to post video ads, that will display in the Google AdSense network.
What is Google's rational?
(1) Web visitors must click the play button to see the ad move, otherwise it will be static (2) AdSense publishers have to enable them on their sites (3) AdWords advertisers have to produce them and post them
See an example at the Inside AdWords Blog.