Very good question sir,
The "Enhanced Peripheral Vision © that's was developed to what you saw started with a dozen years [ 81 to 92 ] of peripheral vision shooting using Quick Kill Pistol. QK pistol uses a narrow band of peripheral vision. I owned that skill when this happened.
Talking smack one day, I made the comment that I could shoot two guns at the same time and make hits like the movies. Challenged and agreed I had some time to see if I could get to it, he thought not.
A week of shooting looking first at one, then the other, then trying to see both using as much direct vision [ as when you'd look for sights ] as I could muster. Nothing, not repeatable in any form until I decided to not look at either one and just started experimenting with enhancing the peripheral vision, extending it out past QK pistols narrow range.
The more I played with expanding peripheral vision, I started to walk around the house and just in peripheral point at objects on the wall, then check it with direct vision, first one side then the other, testing for the best solution and how far the peripheral could be used/expanded.
Come to find out, there's two things that need to happen for this to work reliably. One is to learn how to use peripheral vision to shoot without looking at the gun and then how to expand that peripheral out as far as possible to the 180 degree arc.
The second part that makes it work and if not done results in misses is using that peripheral vision to "punch" the chest of the threats with your fists [ superimposing them low abdomen ]. Now, once you can punch them reliably in the chest without looking at either, add the guns in hands, punch and fire.
It's brain dead simple and there's people here who have been shown how and actually performed two guns like the vid in the course of fire. It's a skill I impart if we have the time.
People think/call it's zen shooting after they perform it the very first time they experience under my direction. In reality, it's something we're all capable of and just don't learn to use peripheral vision as much as we could. It opens new worlds to the student, and I'm fond of telling them that now I've got them shooting without looking at the guns or the threats, the rest of the weekend they are going to be allowed to cheat by being allowed to look at the threats/targets
Joe, did I get that right? 