you're looking at the last of the old timers still working with wood. There aren't many from that generation left, and darn few of them are still using a buzz rig, and this guy has to be the last using a model t tractor, and model t buzz rig.
That's how it was done when I was a kid, and I spent plenty of time helping. The piles of sawdust that were created were the size of sofas. They would be so big we'd have to get after them with a shovel to clear some area so that the saw dust didn't interfere with the new saw dust coming off the buzz saw blade.