OK....
Here, I'll give you two different viewpoints on this.
From a flash standpoint, it was OK. I found the music annoying and the voices weren't very good. The special effects didn't look that good and the characters never really seemed to move.
From an upcoming work preview standpoint, it was very, very bad. The point of a trailer is to show the viewers what you are creating and try to interest them in the upcoming thing. However, you did neither of those things with this. This preview neither told me what your project was, what it was about, and did not make me interested in it. It was just kind of like a cliched joke.
All in all, it was OK, but I think you should, in the future, create trailers that are more like trailers.