https://www.youtube.com/watch?v=sKx87hyWzQA
See timestamps in video description as well as below for specific items of interest:
Suspicious moments:
0:57 - Moderate snapping, ultra steady cursor during kill
8:17 - HEAVY snapping during parachuter kill
12:34 - moderate snap, ultra steady cursor during kill
12:52 - ultra steady cursor during kill
It seems to me that this is a case of possibly manual aim to get very close to target then assist while actually firing. Unnaturally steady, too many kills with too few rounds fired, etc.
JUST to be sure it wasn't some affectation of the spectate mode, I went ahead and spectated a random person in the same helicopter in the gunner position on the same map. Check the subtle cursor movements when firing rather than a 'lock' that's common in the primary video. This vid starts at 3:50 and includes a few kills.
https://youtu.be/r3kW-v_oM2A
https://www.twitch.tv/grandmazc00kies/videos If you want to dig through his streams he probably streamed the game in question. You'll see there's a discrepancy from actual gameplay vs spectator.