It's no accident that the space craft are what is perceived to be just behind the clouds. We never get to see one of them. It was a cool video. All you would need to do is create a roll of moving cuts (like the roll for an old player piano) and put it in front of a bare light bulb some distance behind the glass. Chalk this one up to a man in an ape suit strutting out in the woods.
Nokta FoRs Gold, a Gold Cube, 2 Keene Sluices and Lord only knows how many pans....not to mention a load of other gear my wife still doesn't know about!