It appears an approach made downwind, then a 180 turn at low altitude, aussie flags in video show a strongish wind, so if there was a couple of shear levels which is possible, then once the turn started it was game over, the aircraft was unfortunately lost.
From reading the manual it appears this is a beast that is not to be taken for granted and will bite the unwary and careless.
The pax would have been terrified in her last moments, unfortunately.
While there are no data recorders, enough video footage, to do a frame by frame analysis and work out if there was a Shear event or two.
The turn at low altitude was never a good idea.