That's our club field in the movie at 14:41. The solid guy in the center flying is Jack Garcia. Maybe Dick Brace flying too according to a longtime member. Others (not yet) recognized.
The site is a bit closer to the dam than the current circles. It was covered up in deep silt somewhere in the 1960's and it was easier to build three new ones on a bit higher ground. We have given those three over to the heli and drone guys and are using two newer circles, but they aren't holding up well. Too much hot sun, too little maintenance, not good enough foundation....
Dave Hull
President, Valley Circle Burners, AMA Club #4406
Van Nuys, CA