I can't see why people think this is some kind of supernatural phenomenon. Open your eyes and you will see it is indeed an insect. When you watch the video try to think of it in 2d, walking on a flat screen, and you can see the insects movements quite easily. It's only when you look at the video in 3d that the "blue cloud" seems to come closer and further away. Look here, that boy knows about "ghosts" http://www.veoh.com/videos/v3794361sqDMG5Rz