I’m curious who is the person who supposedly shot footage of the plane from a distance as it was heading towards its crash. If he was in the air in the parachute, who was filming the plane from the ground?
Do you have a timestamp for which part you're referring to? It looked like it was entirely recorded by GoPros attached to the air frame, the camera on his selfie-stick, or the GoPro on his wrist.
I think I misinterpreted that part of the footage and the sister comment explains it.
I suspect it's from the selfie-stick gopro and cropped with subject tracking