I see a skier who is highly accomplished at skiing parallel and being exceptionally smooth on a surface such as this. Assuming that the video is not in slow motion, he demonstrates excellent control of speed. I see significant Z-shape to his path - ie, a quick rotation at the end of each straight descending traverse. While it's not a "ski the slow line fast" path, it is a relaxing way to lazily descend a slope, at least when conditions are good. Many (probably most) recreational skiers would be delighted to look this good on a hill this steep.
However, assuming that he was not intentionally trying to demonstrate flat ski, pivoted Z-turns, and that he understands and wants to be able to do "GO THERE!" turns, there are several aspects to his technique that could stand improvement.
Specifically, the edge angles that he is developing are not even close to being sufficient to allow him to stop skidding and start carving. Pause the video at each each moment when he is directly facing the camera, and you will see that he is using very close to zero angulation. There is essentially no "C" shape to his body. He is banking all of his turns.
In addition, if you go through the video frame by frame looking for vertical motion of his CM relative to his skis, he is amazingly static. His CM probably moves up and down only a couple of inches in each turn. Another thing that contributes to the image of "static" (ie, not dynamic) skiing is that his lower body is essentially rotationally locked to his upper body. There is only the slightest hint of "keep the torso facing down the hill", and this leads to a general turn-like-a-robot, stiff appearance.
Cncerning tip lead, stop the video right after he comes out of the apex of each turn, and you will see what looks like roughly 12 inches of tip lead. This is excessive.
Finally, FWIW, doing the frame by frame analysis, I do not see any trace whatsoever of the stemming that some previous posters mentioned. The split of his legs associated with the excessive tip lead may look a bit like A-framing or stemming when viewed at normal speeds.Rx:
I'm not going to attempt a full discussion of this because many of these problems have been discussed on Epic in the recent past, but if I had to describe how I would start to work with him, I would:
0) Get him out on a recently groomed run, make some turns with him, and then walk back uphill to inspect his tracks and yours. There is nothing quite so convincing in terms of starting the process of improvement.
1) Practice carving single turns back uphill from a traverse. Attempt to regain as much altitude as possible. Have him look back at his tracks and make sure they are thin lines, not brushed.
2) Work on the components of an angulated position, including flexing more deeply allow the skis to be edged, and then extending to flatten them to initiate the next turn. It's OK to temporarily exaggerate this while practicing.
3) Incorporate the above into a fan progression, eventually crossing the fall line and carving back uphill in the opposite direction, still one turn at a time.
4) Start to link turns. Patience in turn initiation. Attempt to dial all rotary out of the transition.
5) For variety, RR tracks on the bunny hill.
6) "Follow-me" lessons to imprint on him that the desired path will feel nothing like the path he is currently taking down the mountain.
Just my $0.02. HTH,
Tom / PM
PS - In the interest of full disclosure, and so nobody thinks I'm a paragon of skiing virtue, I have been working on many of the same issues in my own skiing.