Can you discern a difference in the ‘sky background’ light level where the object is visible right and left of the building? Appears the background is much lighter around the ‘object’ on the left side framing.
I don't see that, but since I've got absolutely nothing else to do this evening, I made a single PNG file of the 10 frames of the high-resolution version of the video that document the sudden leftward acceleration of the object and its subsequent disappearance. Frame 0 is the last frame in which the object is not moving; Frame 1 documents its first movement leftward, and so on to Frame 9, which shows its momentary reappearance from behind the building before disappearing for good. No later frame of the video contains an image of the object. Since the image file is about 1.5 MB, I'll just post a link to it:
Thnx. It appears several are trying to download it presently. I’ll click on it later. Thanks again.