That her hand is on the controls is sure to raise some questions.
Really don't see why it should and comments like that just smack of unnecessary scaremongering. Previous videos show him allowing his son to have a bit of hands-on but there's absolutely no way he'd have been stupid enough to allow his partner to be flying it during the 'display' or the approach.
Judging by some of the comments on this thread I'm surprised some of the 'pilots' here are able to fly a circuit, given the dreaded turn from downwind, into wind. FFS don't you do that on most occasions every time you land?
My uncalled-for, tuppence worth: Seems to me a case of a skidding turn and, as witnessed by the video, an attempt to recover that skid by trying to roll right, instead of applying right rudder. Down goes the left aileron, up goes the angle of attack on that wing (not helped by it being the 'inside, slower' wing of the turn), left wing stalls and Robert is your uncle with, unfortunately, not enough height to recover.