http://www.xbox.com/NR/rdonlyres/351F650A-09D1-4ABA-ADD8-3D2E0EC7F6B8/0/vidLostOdysseyTVAd01Hi.asx
If that link doesn't work by clicking it, drag it into a player or something, but it seems to be the extended TV commercial. I like it.
Lower res youtube version
http://youtube.com/watch?v=3w1Ry4NbPcc
Note: Some games in my collection are no longer owned, but have owned.