If you look at 1.50-1.55mins, as the a/c goes into a severe right wing down (downwind), you'll notice the left aileron UP accompanied by the flight spoilers. This suggests a large left aileron input, yet the a/c goes into sharp right bank. That would suggest some large right rudder input to remove the drift accompanied by left aileron to counteract the associated roll. Except, either SOD's law was in action and a gust from the left got under the wing, or the rudder input was too agricultural and over-rode the aileron input. We know that at lower speeds the rudder can be more powerful than aileron and needs finesse. Why the a/c then suddenly lunged onto the left wheel is speculation; either the gust was removed or the size 12 on the rudder relaxed and the a/c came under aileron control in rapid fashion.
The GA was an excellent decision and well executed. As in Question of Sport (and it did look sporting) is 'what happened next?' It looked do-able for a 2nd attempt.