Oh man, you should have told me that you were going to use my voice.
I could have gotten you a much better recording if I would have known.

Plain set, light flicker, no easing out-in, set bumps, audio not synced up all the time, Lame voice acting, (On my part) too many still pictures, Five Armies and a weird, somewhat hard to read font....Yeah, this wasn't your best film ever.

The sudden switch in music and font type wasn't so great, as it needed continuity. No shots of the "Hero" no info given as to who he is, what he does (Other than say "Banned") and not the most original plot that I've ever heard of. The idea COULD be turned into some cool, epic film. But if not handled right, well....You know.

In conclusion: Might have been a good trailer, but a number of factors kept it from being as great as it could have.
Try making something a little more involved, and work on the animation.