Great Question.
The "Movie Screen" is an imaginary vertical wall that the WHOLE CLUB is swung to—or through, when full rotation of the left arm flying wedge (with a slightly arched) left wrist, reaches it.
At this point, the golfer tries to put ALL of the club and clubface on this WALL or "screen."
It isn't a position for everyone, but boy it works good to fix slicers and flippers, among others.
Here is a picture of me with the club "
on the movie screen" from my new video
Never Slice Again! 2.0: