Check hands behind the trail shoulder to verify low hands
The coach gives checkpoints for confirming the change on video: make sure the hands are in, feel belt-high hands, and see the hands behind the trail shoulder through the middle of the trail bicep (right bicep for right-handed players). You should also see the ball drawing rather than slicing, and flying higher and farther.
Channel: SagutoGolf
Watch official source at 6:49Why this context matters
Self-check checkpoints for the low-hands backswing change.