Might be useful to some. I created these for my own investigation, then decided I might as well share them. Of course, a significant assumption is that the source video, posted somewhere earlier in this thread, is genuine.
For pretty accurate maintenance of direction of viewing, more or less the same section of a building has been maintained in the bottom left corner. The scale is identical in all pictures. The path of the moving light (missile/projectile/con trick/whatever) is therefore defined by the sequence of pictures, moving from from top to bottom. The pictures are not, however, accurately equally spaced in time (although they aren't far from it).
My own conclusion, FWIW, is that the moving light is a missile/projectile/con trick/whatever. Take your pick or invent your own.
