Let the trail arm fold to hinge the wrist
The coach explains that in Ben Hogan's move it is the folding of the trail arm that hinges the wrists, not a conscious wrist hinge. He says consciously hinging the wrist is wrong; instead, letting the trail arm fold hinges the wrist fully and puts you in the classic Hogan backswing position.
Channel: SagutoGolf
Watch official source at 0:34Why this context matters
Coach frames the move around Ben Hogan's backswing.