Nice message
While the animation itself needed work, I could tell you were trying hard to animate it. The music you choose also fit very nicely into the movie.
But the important thing is the message you were trying to pass, which has led me to believe this was made uniquely for your father, right? Or maybe someone's father?
Or did you randomly choose to write "Daddy" at the end? Anyway, next time you make a video, try to make the animations more fluid. For instance, look at someone running in real life, and try to copy that into the Flash. Search for human pics and study anatomy by yourself. Those are small things that would greatly improve any Flash videos.
Keep up the good work!