As I jet pilot, I can say that they're using some sort of software to keep their speed between 305-311, because you cannot get higher speed while doing vertical loops. In my experiencie flying jets, I know that all the jet pilots out there always strive for perfection and maintain our speed between 310-315. Also, I can notice that the guy in the video does not make any maneuver, like switches, cuts, etc. I've ecountered myself with some other jet cheaters and all they do is loop.
cringe
he's literally just first person looping