Well FBF is nice...
... but this is pretty well just a piece of practice for you, I'd say, and not really anything worth taking great note of.
Sure the animation is FBF, which is great, more people should use FBF, but it's wobbly and it's really just a sequence of a few hundred frames of doodles flaoting about. I haven't got a problem with random animations with music and stuff, but this itself is so minimal and really just doesn't quality as anything but a mediocre-ly animated sketchbook.
My advice, clean some stuff up, give it some colour, give it some thought. Even something that is totally random should have some thought to it. Also, use the onion skin, and if you already are, pay closer attention to it and make sure you have things lined up properly. Also you don't need to continually re-draw EVERYTHING in your frame. That's the beauty of Flash, layers; take advantage of them. Even on a single character, why not try and break it up and you say only need to draw the head for some movement or whatnot.
That's my suggestion. Once you've done this, post more animation, and I'll have my eye out for it, and then I can offer guidance on actual principles of animating, such as timing.