As talked yesterday on Vent, Video Games Live:
https://www.youtube.com/watch?v=GBpzVD4GZ8E
Seems there are more concerts (Levels).
Thats the one i did see, with Halo, Civilization, WoW Medley, Mass Effect.....
Personal Highlight: at 1 Hour, 11 Minutes
Well and 1 hour, 31mins is rather awesome also
https://www.youtube.com/watch?v=kB1j8bYOItw
and while browsing around i stumbled over this - hach, memorys
https://www.youtube.com/watch?v=uA5LTWiJkKU