As I stated in another post, I am writing a review paper for my personal website and that composite photograph of capture images from a swing video is used to demonstrate only the first learning action - learning to execute a right clap hand motion, which only trains a golfer to understand how the right forearm and right elbow should move in the backswing (and not the right wrist). The second learning action re: the right upper limb requires learning how to bend the right wrist without allowing the right wrist to upcock - while performing the right clap hand action. That allows the right palm (and clubshaft) to remain on-plane during the backswing.
I am demonstrating that point here.
Stuart Appleby is doing a better job of demonstrating that action here.