At first it just looks like something shiny in the trees, but stick with it until around 2:15 or so. Suddenly whatever it is starts slowly moving and you get a good look at it. Thing is it doesn't resemble a flying saucer as much as a cluster of spheres, like balloons or bubbles. But it doesn't seem to be at the mercy of the wind, it sort of just decides to start floating away, then changes direction and moves away from the camera. Also it seems to be somewhat symmetrical in shape.
I'm at a loss with this one. What language is this video in, Russian? The board is from Brazil, can someone translate some of the comments?