As an official (admonished...) directional faller, at least often enough (most of the day, every day), I'll try.
All he did is face it where he wants it to go (or lightly compensated due to side lean) and bore in behind the hinge. Established a hinge, cut toward a back strap. He inserted a lever instead of wedges cause it must be smallish wood. Then he cut his strap probably at a angle just cause, could have been level, doesn't matter, then levered the tree over with his bar. If you want more explanation, ask and I'll fill you in. Oh, and I have to say, bore cutting is dangerous, as are chainsaws, and driving to work, and everything else.
Sorry folks, this is europe. I don't think a dutchman flies over there. I'm hope people have these tree swingin skills over there, but I'm pretty darn sure they're not teaching it formally.
cuttin heli wood tomorrow, and the next day, and barring one or two days to keep our mudded out loggers busy, pretty much every day for the next 3 weeks. Sweet. I'll be sure to swing a dutchman for each of ya'll, and more than one open faced bore felling for my pinko commie socialist european co-horts!!! (by the way, thats what the most valuable wood gets, no matter what!!!!)