Pigdog

No, he didn't cut any wedge out for hinge control!
It looked like he was making three cuts that were angled downward slightly to the center of the stump.
He never made any two cuts on the same side of the tree. It looked like he cut on three different sides of the tree. The cut pattern on the bare stump looked like a triangle pattern! No straight hinge. What little hinge visible looked sort of triangle. It also seemed like the trees fell 90? to what they should have fallen when looking at that wedge of a hinge. I'd never seen nor heard of anyone doing it that way. He was laying those trees out side by side too!
That logging team made it look like they had it going on too, by watching the skidder and log loader working without much more than communicating by hand signals. There were only 3 people working, not counting the truck drivers hauling off the logs.
The sawyer would cut the tree then walk down limbing it, then hook a tape he had on his belt and walk down the log then cut the length.
I never saw that fellow pinch his saw either!
You could tell he'd been doing that work for a long time by just watching him work! He'd get a few trees ahead of the skidder and then the skid driver would be doing his thing gathering the logs while the sawyer was staying ahead, dropping trees.
After the skidder had a pile of logs back by the loading crane, he'd work those logs into position for the loading crane. It didn't take them long to clear cut that lot!