The guy on the crane has a helmet, but the people the trees could fall on do not. That's kind of weird. I was nervous 150 feet away from that crane.
It's hard for me to believe anyone would run a chainsaw every day with no ear protection.
The crane guy is cutting the trees in one cut. They limb the tree, and then he takes the trunk down in sections. When he cuts a section, he just cuts with one hand and pushes with another. When it falls, the side away from him splits off, and the log swings from it until the split part breaks. I would do a cut on the far side first to prevent that from happening.