erased the flying saucer whenever the special piece of UFO-detecting glass was held in front of the camera
I guess you mean 'erased the saucer when the glass was not in front of the camera! Because I can clearly see it with the glass.
You can tell by the pixels that it’s faked, though! The UFO is clearly there all the time and they just cloned over some of the cloud texture when removing the ‘magical glass’ . Sheesh. it’s too obvious.
