If he's cutting that tree to mill into boards cutting 16" higher would be wasting quite a number of board feet... there could be 15+ b.f. of boards in 16" of that log. For example, a 14x14" cant 16" long would yield about 20 b.f. if cut to 4/4. Net (14x12.5x16)/144 = 19.44 b.f. 12.5 was used as an estimate to allow for the kerfs. That is a fair amount of money in walnut...I have watched the longer video trying to figure out what happened several times. The whole thing looks wrong from the beginning.
-Why would you be flush cutting , to drop a tree with branches. Go up 16 inches..get out of the balled up position.stand up and cut.
- he never watches the crown of the tree, its alwsy the kerf.
-the part that gets him is his retreat. He retreats to due south of the cut. To make a show for the camera. He got closer and behind the trunk. Instead of heading 45 degrees directly away..
On the long version of the video I was surprised at how high his stump was on the first tree. That was until I looked closely and saw there may be some defect on the face cut side of that tree. The second tree was more like I expected.
Yes, not looking up was generally bad practice... as was his escape route. Being that a bore cut was used to set the hinge on the leaner I'd have stopped the cut and left a trigger. Then withdrawn the bar from the kerf rather than exiting the cut out the back. That would give the cutter a chance to take a look for hazards before and during cutting the trigger from the outside of the tree. Hopefully, now that he's been spared of death, he will change his ways in the future!