In a nutshell
If I had seen this on a commercial, it would make me buy the game =).
To be honest, however, this style of a video has already been done many times before.
Go for a little smoother animation, add a little more explosions (since 'epicness' is what I assume you were going for) and be sure the audio isn't as fuzzy.
Keep em commin' good sir!
-Murphh