Well, I'll bite. I agree with nearly everything said so far. But only as they apply to isolated segments of the clip.
Boomer and friend apparently didn't just put together a clip of him skiing. They put together a clip of lot of different "skills" and drills that he has come up with, either from what he sees other guys drilling on the hills, or from what he's come across trolling around on the internet, talking to Joe Bob in instructor jacket waiting in the lift line, etc. Fine. No judgements. You can get by like this and ski the whole mountain, at least anything I've every come across in NE. But Boomer wants people to look at him and say, wow, that guy knows how to ski. So, as Jaques even said at some point, he's showing off.
First sequence, up to about :43 is where he is all back, ankle flexion doing nothing, driving from his ass in the back set. Honestly I don't know what that's about. Maybe that's his "base" technique.
Then comes some decent ankle flex, but he start to screw around with his upper body and some of that knuckle dragging nonsense, so he starts to get some forward pressure, but basically what he's doing is turning from his shoulders. That touch the snow business has him transferring weight forward as he bends forward. You have these incomplete turns because he can't finish, and all that inside ski / divergent finish stuff is going on like others already said.
Then somewhere in there - by now I stopped the frame by frame detailed analysis - he starts to screw around with lifting the inside ski. Perhaps as a way to initiate edge by forcing an outside pressure shift. Whatever. He's doing it while he stays pretty much within 10 degrees of the fall line (so he looks like a speed demon, but really he just doesn't know how to do this drill). Then he goes on to a series of runs where he's showing off his hopping. Funny, I know a hopping drill too. It was taught to me to develop a sense about initiating with a skid, if I remember correctly. And it certainly wasn't off of a jump.
So my sum total analysis is that Boomer doesn't know how to initiate a turn. He's come up with several ways to initiate that seem to more or less get him to go in the direction he wants to. I'm not one who puts a lot of stock in pro lessons, but I'd have to agree that this is a case where getting some "forget what you think you know and get back to basics" is in order. The simplest way to do that is with a lesson, but he needs to go into it explaining that he wants them to work on turning from the ground up, maybe not all the way back to the wedge, but if that's how the instructor wants to do it, c'est la vie. Otherwise he is likely to get a little of this and a little of that - level hips, arms forward, ankle flex, just like you get asking on a forum and you get a whole series of posts, all on point, but more than a few missing the big picture, and even if he did go out and master every single one of them, he would just end up with a bigger grab bag of "tricks" .