If this is an insect, it has to be really close to a camera, maybe a few feet away, to move at such speed. But if the camera is focused on the object 2 miles away, the insect would be out of focus and it can't be seen in the video. IMHO.I looked at it a bit more, It looks like its something out of focus that is nearer rather than up close to the rocket itself. The timing is extraordinary, but i think its a bug or bird or something. There something hanging beneath it like legs, and it looks like its in front of the tower in the last frame instead of behind. This pic is taken from over 2 miles away. Focus is so far out anything that comes between the 2 would be super fuzzy and appear to be traveling super fast. Just my opinion.