Shallow with the lead arm and let the shoulders lead
Keeping a strong grip, the speaker's approach is to go to the top with a little cupping, then start down keeping the club shallow using the lead arm while staying square. From there he extends both arms to punch power through the ball with the shoulders in control of the swing, instead of micromanaging with moves like too much tilt or firing the hips.
Channel: SagutoGolf
Watch official source at 5:18