How Do You Start The Downswing?

In this video Brian answers a question about starting the downswing from Andy Sill in New York:
“My question is about the transition from backswing to forward swing. When I do the “danse du golf” exercise, the change in direction in my body feels natural. But somehow, when I’m actually swinging the club, I’m not sure what I should be feeling or thinking, especially regarding my arms and hands, as the club changes direction and I begin the forward swing. Any insight you could offer would be much appreciated!”
There are also references in this video to similar questions from Jim Marlow, Tug Wilson and Hans Juergen Doll.
You will hear Brian talking about the Easiest Swing philosophy which believes that golf teaching has become too scientific and complicated.