You'll hear this often, but...
...Veloso did it better, and used the whole song.
Audio quality is high, which is good, but judging by the quality of the faces in this, and the smooth fluidity of the various forms of motion used, you have both the artistic and technical skills to make a much, much better Flash animation. That the potential for such skill is visible only manages to detract further from the enjoyability of this piece. Beyond that, you seem to have taken much of the choreography almost directly from the original Yatta! footage. An uninspired, half-hearted attempt like this is almost worse than no Yatta Flash at all. Please, for the sake of your own pride and reputation, try harder next time.
~Burkemun