I was wondering the same.
What are the gotchas here?
How likely is it that the base of the tree ends up falling toward you? Seems pretty low but is there anything you need to do to ensure it?
Bar getting pinched - seems high. Does cutting half way through from the top then finishing with an undercut not work here? (full width of the tree in both cuts)
Angled vs straight cuts. I've seen some folks do this with angled cuts rather than straight. I wasn't sure whether angled produced a better result (helps tree fall away from you) or was just more convenient due to the reach and saw angle.
If you read the tree correctly it will not fall towards you, it comes with experience. Also, you can aim the tree by where you make your cuts.
Bar getting pinched depends really on the angle of the tree, when making top cut you just want to blast trough without hesitation. Finishing with a simple undercut will work just fine but i prefer 'scribing' and boring in so my cuts meet perfectly.
I don't think that angled cut helps tree to fall away from you, rather than there's less of a chance to get bar pinched.
I personaly don't like angled cut because then i'm left with ugly angled bucks, i'm really anal about my firewood being squared
For me personaly getting a tractor into forest during winter is not an option. But the fact that this is firewood let's me use this kind of 'dirty way' to get em down.
Obviously if this was going to be a timber for sawmill then i would come up with something better. Such as boring the hinge out from the middle and then just grind the corners till it either falls on ground or till hinge is gone so i could use my felling lever.