Very often you need to exaggerate a movement to even make a small difference to the actual golf swing.
In my own case,I used to have a flat backswing and I need to feel like the butt of the club points behind my feet halfway into the backswing when my left arm is parallel to the ground,almost like I am getting in position to hit a home run.On camera though,I am nowhere near that steep and pretty much on plane.
Agreed. I practiced against a wall to get the feel, then reproduced that FEEL in my swing. It FEELS so much better (and steeper), contact & ball flight is much improved, but on camera, its barely noticeable (guess I still have some work to do).