I'm not saying this is real or fake, but I did notice something interesting about the saucers exit. Look at the dark low lying cloud cover disperced
throughout the clip. When this thing takes off it actually runs through one of them. The cloud wraps around the craft, lingers a bit, then disopates.
I didn't include the disopation of the cloud for lack of upload space, but you can check that out yourself.
This to me indicates that it may not be cg. It also tells me that unless the clouds were hanging incredibly low that this is actually much higher than
the building so the thought of someone pulling a string to retract the saucer/balloon back is also out of the question.
Another thing to note is that this thing is not at a constant rate of speed. Look at the speed trail or blurr effect. It is steadily increasing in
speed. If a balloon was yanked from inside one of the rooms on the building I would think the speed would steady or even decrease in speed. The blurr
is getting longer even after the craft seems to go behind the building.
Just some of my thoughts.