For that AMV, I used the .Hack//G.U. Trilogy Movie. It's a movie that was made for .Hack//G.U. entitled Trilogy, in which Haseo gains a new form called B-st Form, and it's basically a re-telling of the G.U. Games. Just in movie form. You can order the DVD Online, like I did. Although, you could wait, seeing as how Trilogy has got an American License, and will be translated to english with the same voice actors as the game, later in 09 I believe. No release date for the American version has been set yet.
Glad you liked it.