It was a challenging 1kt gusting 2kt. How do I know ?, I was standing there and saw the whole thing. As Andy RR said, the basic handling was maybe a tad behind the aircraft. If there was a dragging brake, it would , or possibly could , have been the left one, but it was hardly on the ground, and when the aircraft went past the camera, both wheels were rotating freely...as a dragging brake, you would think, could create a dusty rooster tail . Yes, its all very well to be monday morning quarterbacks, but a nice clear and up close video, does not lie.
Damage is more than stated in the Youtube clip. In fact its quite severe, as the starboard lower wing aileron is snapped in half, and the adjacent wing spar suspect, and therefore upper wing spar needs very close examination, as the metal struts would have passed on the shock load.
Shame, as it is a very nice example of a Stearman.