I'm not answering for rwh, but I can tell you this:
At last year's PGA Merchandise Show,Joe Daniels, president of The Golfing Machine, LLC, hosted a gathering of TGM Authorized Instructors and 'interested others.' Chuck Cook was a featured speaker, and from the podium, he held aloft the 'Yellow Book' and said (paraphrased):
"This book has made me three million dollars."
That statement leads me to believe that Chuck's videos -- I have seen none -- contain more than a little TGM.
But I also would not be surprised if, as usual...
The genius and gift of Homer Kelley remains "under wraps."
I got his book and he identifies The Golfing Machine as part of his education in the intro . . .
As a follow-up to the original post, exactly how did Homer study the golf swing for all those years? Am I correct in my understanding that he largely used photographs to go along with his own knowledge of engineering? Did he have video of great swings (Hogan perhaps)?
For those of you more expert than I (I'm approaching my one-year anniversary in TGM) and still am a beginning golfer, isn't it possible that Homer might have written a very different book if he had had the benefit of modern computer programs, launch monitors, etc? I'm not trying to be a wise guy here; I'm just wondering. I doubt that the three imperatives would be any different. It's the rest that I wonder about.