In post in Joe Healy's blog (
http://www.devfish.net/FullBlogItemView.aspx?BlogId=441) he said “Pick which you think is cooler, the Silverlight playback or Halo3 trailer itself”. I need an option C. I did not have Silverlight installed. So when I went to the page it told me to download it, and within 30 seconds Silverlight was installed and I was watching the movie. So I vote for the easy installation as the coolest. But the video was awesome also!