C. David Henderson

Seemed to me there was a lot of shoulder-driven movement in the You-Tube clip linked in the OP. I didn't see that when I looked at the clip posted on Read Sensei's site.

Not that I'm an expert, but the differences in fluidity, structure and power seemed pretty clear.

Putting aside for an instant the interesting discussion about ethics and how we got here, Mr. Hamaki seems like a strong, athletic young man who has worked for a time at learning a difficult set of movement skills.

When I compare the movement in the two clips, I come away with the impression that Mr. Hamaki can approximately reproduce the movements he was shown. However, in the clip his execution seemed rushed and overly reliant on upper body strength compared to the other clip.

I don't get the "internal" part at all. Maybe I missed it.

2 cents at most.