A decent trailer with smooth animations. Just one question, why is this rated M for Mature? There is really nothing inappropriate here. In fact this could be rated E for Everyone. That aside decent job.
A very simple animation. I'm guessing this is supposed to be some promotion? The complete silence at the beginning is a bit jarring. Even if you use a cartoon-y "shifting eyes sound", it would be better. The beginning of any movie should peak the interest of the audience, keep them watching. Also, this is Newgrounds. Get rid of the YouTube edits.