maybe a dumb question. but any real danger in mirroring the classic notch cut? I find it a combination of an open face cut in that it allows the tree to 'jump off the stump' i find it works quite well for getting the thing down quick and not letting it have the time to move around. other then having a trickier time maing an inclined cut low to the ground its the same as a classic. i also always use wedges. even if they arent 'needed' to me its better to have them and not need them then to need them and not have them or have enough time to use them.
I think a major difference here is that, as he said, he misread the lean and then cut through the hinge from the front. The face cut looks too big on the stump because he enlarged it after getting the saw free with wedges. Looking at the base of the trunk though, I don't see a problem with the initial face cut.