Not really bad. The best effect was the reflection of the skeleton's hammer. What you can improve is camera use, it has some edges in movement and during the fight, you should cut faster. But all in all I have seen much worse camera use.
Oh, and I always welcome: A story. DotA has no story, too, if I know that correctly, but that's no reason to leave it out in a cinematic too.
All in all 3.5/5, I think.