An object moved into the field of an infrared camera pointed upward, did a motion reversal, split and moved off screen, but intact?

This was difficult to follow. In about half a second a bright object moved into the screen of an infrared camera facing upward from the lower left. It appeared to be headed out of the screen from the bottom but suddenly changed direction upward and appeared in full in the screen, but the shape was too ambiguous (to me) to figure out. It then split into two objects which quickly departed from the bottom left corner of the screen. It wasn't clear (to me) if the split objects recombined, or left in close proximity to each other. The whole thing was too bright and too quick. There was a wind, but this does not look or behave like wind-blown debris. Sorry - a lot of ambiguity.