Okay.. your thread caught my attention! And this is just all my opinions... Voice acting has been mentioned a ton but... ... well, I work in the entertainment industry, kind of, so I just want to offer some advice ^^;
I think your video is off to a good start. But if you want to imitate a movie trailer, you have to think about them being geared toward one thing: Selling the movie.
I don't think you do enough of that here. There's not enough dynamics, there's not enough eye candy... there's not really a clear, focused plot point. There's a lot of talk that could be condensed (general writing style rules)-- the shorter to the point you are, the better it is.
*shiftyeyes and tries to condense this post* '_';
To me, it felt like the main focus of the movie was toward adventuring, and then saving the world, and then the world in crisis. Too much at once. Not everything has to be revealed in the trailer.
Someone mentioned this trailer:
YouTube - FFXI CoP Trailer Fan Fest 2006
I might be biased, I've seen that when it first got released to the community and I fell in love with it, mostly because it's successful in many ways (again, my personal opinion)... and videos often shouldn't be compared to one another due to style reasons, but see how the author threw in the entire focus of the trailer in the first few seconds, and it stayed consistent throughout the whole thing?
I'm not saying that everything has to be done in the same style, nor am I saying that everything has to be "In your face, loud music and flashy" (like the Anime trailer that was mentioned again, earlier in the thread-- but that wasn't trying to imitate a movie trailer) but in entertainment, in this day and age, if something isn't pushed to the extreme, it's going to be hard to make it stand out.