I have to nitpick here a little. Something bugs me about watching removal videos like this where the climber seems to do everything possible to avoid using his gaffs as they should be used. Stubs everywhere, ropes everywhere. To put a facecut in a tree that diameter while hanging from an overhead attachment point is not the safest method. You're pivoting around rather than standing firmly on your spikes, and if you do get a kickback from the 80cc plus saw, it just might cut your climbing line which will drop you smacking face first into one of those stubs. It's very common for a saw to kick a bit when cutting a large diameter facecut out. Another point is the type of facecut. Humboldt or conventional doesn't matter so much (although the point of removing a humboldt notch being easier than conventional is correct), but the height of the backcut above the apex of the notch does. The pull line obviously has a good bit of pretension on it, so if it just happens to go sooner than expected and your saw is in a kerf that is on the falling log, goodbye to that. There's no reason to be that high above the facecut, it only makes judging the holding wood more difficult. He would have been better off with much less holding wood, in fact the last piece nearly tore a strip down the side where his lanyard was.
Good video though, cool to get it recorded so well.