Minecraft cartoon trailer eh? Not bad.
I would say that it's a nice animation, but I believe that it could go ever so slightly smoother than you currently have it at. The music was blaring. Lowering the volume would be nice.
Just a couple of suggestions for when you make the full movie. (Unless you already have.)
The movement was a little choppy and not much actually happened. You may have some spent time on this and drawing the cube people of minecraft isn't easy but unfortunately the finished product isn't that amazing or new
Who cares i had fun making it