CoBrA B, about your map:
The first thing I noticed was the really, really, really weird floor in the house where they're celebrating in the first scene. It's like there are 10 layers of different floors switching every 0.10 seconds! It's really annoying.
The second thing (when just outside), Jaina runs bac and the camera goes through 5 houses. It's a bit strange to see. Also just after that, you'll notice the banners on the backgroun clearly hanging through the roof.
The scene's until the boat were good. It might have been a good idea to set animation speed of the boat to 0% though.
At the assault, they group together, but they're not facing the right way. You know it's very rude to stand with you back towards someone who's talking to you

At the crystal place, Arthas has a big line. Nevertheless, he can say there with only 1 H. Thhere is no other way to spell it

When changing camera angle, you'll see the Lich King waiting long, long before he comes in action, so that's no real big surprise.
The rest of the cinematic went smoothly.
All with all, this may look like a list with a lot of complains, but seeing the time you've been given to make this, I think it's well spend time. If you can fix these things, I think you got a entry of equal winning chance as the rest
@Bounty Hunter 2: Thanks for the feedback on that. I'm a terrible terrainer, so I'm already very impressed by this. I'm trying to make it up to it with my triggers. Even if I'm not able to make it for the contest, I'll finish it and probably publish it for fun. I tried to make a triggered 'AI' for the citizens and cars to make it look like a real city with real people ^^