Wonderful stuff. Thanks for posting this.
Two things that stood out in just the first few minutes were watching Duffy walk backwards w/ that rangefinder (Canon?) while apparently filming his model walking, and the shot of his son Chris sitting at his desk with what looks like a digital image editing program up on his computer monitor. How things have changed. People looked so much healthier back then, not all poofed up like today.
I wonder if that fantastic contact sheet multiple image of Christine Keeler is what gave Warhol the idea to do that w/ some of his paintings around the same time?