Alright, so I checked out the cinematic.
The terrain needs to be improved a lot. Use more doodad variation, like shrub, mushrooms, more rocks, etc (and fog, custom music, weather effects for a better atmosphere).
Cameras need some work. Like Kobas said, make sure you don't let the camera go through any doodads, but around them.
Another problem is disappearing destructables, which happens when you give them a big scaling value, and get too close with your camera.
Grammar needs some work as well.
For a first cinematic it's alright though. I give it a 3/5.
Keep practicing.