I'd say the video has been flipped upside down. At 1:51 the gimbal seems to be pointing straight down and the video cuts scene to hide when it hits the endstop.First time I've seen a drone workout-showcase video :-D Nice!
Very nice editing (esp the mirrored triple-split-screen).
How did you do the shot at 01m:45s? It looks like gimbal is pointed down more than 90° (so it's actually pointing backwards) and you're flying backwards, which is not possible on this drone - how did you shoot it?