Excellent trailer. I quite enjoyed it. I went through it a second time, and picked out some things to work on, though some of them were pretty obvious the first time through.
-I like the end sequence, it just needs to be prefixed by a "Choose how to play" or something, and then label each of the races/factions that are shown. I do agree that the very last part of the trailer needs to be something more dramatic. Armies charging together, a lancer charging through the camera, or my personal favourite: rearing your horse while thrusting your (bloody) sword straight up, backlit by a setting/rising sun. Use the ~ to get the best camera angle.
-I agree, turn off names above troops. Why would you even need it in Fantasy Mod? The enemies are a different SPECIES.
-"You get to determine the outcome." is... uninspiring. How about, "You will determine the outcome."
-"War is upon the lands" needs work, too. War has descended? War spreads across? Engulfs? Envelops? Ravages? War burns across the lands?
-Lastly, while "Fantasy Mod" is a helpful name for discussing it on the boards (things like 'ASLOW' are very confusing when you don't know what that is), it really does need a better title for outside references.