I honestly have no idea, which is why I just characterized it as "mighty hinky". To get that shot for real, the plane would have had to somehow catch up with his free-fall descent and circle around to end up underneath him. For an unmanned aircraft to carry out that maneuver seems extremely improbable to me. Even with a pilot at the controls it would have been challenging to pull off. Catching up with a skydiver in freefall is not easy.