I filmed a UFO, what do you think it is?

I filmed this off my balcony a couple of weeks ago. I don't like to jump to conclusions when i see things in the sky, because personally 80% were explained if you watch long enough..
In this video, i can only assume it was a wicked quad copter though some of it's movements are questionable; also the light configs that glowed all different colours.

Have a look for yourself