For the record, I'd like to say that I don't think their is a right technique or a wrong technique. Just as ski design constantly changes, so does technique. Just as terrain changes, so does technique. As conditions change, so does technique.
There is no perfect way to ski. There is no perfect skier. There is no perfect run. For every skier who makes a run down the mountain, there is a person who thinks they have the knowledge to critique that skiers abilities. And certainly, there is no one person here perfect enough to critique correctly every video put up. Why? because everybody sees it from a different point of view based on their skiing beliefs and the way they as individuals have evolved as skiers and teachers.
Skiing will certainly change again as certain as ski design will change. I wonder if someone put up a video of someone skiing 20 years ago, if any of us could critique it properly? It's really funny how ski design has changed technique theory over the years. Isn't it?
People see things differently. That's fact. You can have 20 people witness a crime. Not all of them will see the same thing. That's fact. Same with critique on video. We all see different things at different times. It's the discussions and the egos that get in the way that really distort the real pictures. The slow motion and the stop frames. Not the skiing.
So, my theory is that there is no one here perfect enough to be infalable or mistake free in their critique. No one that never makes any mistakes or skis perfectly enough to be perfect and right all the time in their critique of others.
There is no right way to ski or wrong way to ski. There is only skiing. It might be good, it might be bad. Just like your critique.
While there is no such thing as perfect skiing, there is such a thing as great skiing. Even people without a technical background recognize it when they see it. Great skiers all possess the same solid fundamental skills. While there are certainly differences in style across great skiers, at the lowest level they are the same; they all know how to balance correctly on a ski, and they understand how to correctly apply edge and pressure, and then possibly other forces to make the ski turn. While changes in ski design have made high end skiing more accessible than ever, these fundamentals have not changed. Go back as far as you want to go, and the best skiers have always been working on these things.
The key to evaluating any skiing is to watch what is going on with the skis. If the skis are doing the right thing, then nothing else really matters. Hilly is skiing with a style that is appealing to some, but not to others. He's fairly square and inclines into the turn, and there are trade-offs embodied in skiing that way (as there are in skiing any way). But it works--at least for the conditions he's in--and it's great skiing. Put 10 of your favorite ski movie stars on that same pitch and they would all look a bit different, but they would be equally well balanced on their skis and they would all be using edging and pressure to make the ski turn. Great skiing. Put the same 10 skiers on a bump pitch or a powder slope or any other slope of your choosing and you are still going to see the same skills applied to make the ski turn. "Carving movements" don't always produce carved turns, but they are the key to skiing well everywhere.
Then drop the rope and let the public ski down and you would see very different skiing. Lots of pivotting, braking, and general muscling of the ski to make a turn. Obviously bad, ugly skiing even if you can't put your finger on why. Many people are happy with skiing ugly and inefficiently and that is fine. Learning to really ski well takes commitment and discipline. OTOH, if you aren't interested in improving your skiing, why are you wasting your time reading posts in the ski technique forum?
Ski Dude's comment about arm discipline (Hilly tends to leave a hand behind) should be taken in context. Arm discipline can affect balance and most of us will ski better with our hands forward. So for people on this forum looking for examples of how to ski better, the one thing you might not want to emulate in Hilly's skiing is dropping your arm at the end of the turn. For Hilly, it doesn't appear to be causing any problems, so for him at can be written off as just his style of skiing (or it might be something he wants to change). Either way, it's still great skiing, and I think most of us would call it that even if we wouldn't ski that way ourselves.
Rick's comment is more interesting. I see why he thinks there is a pivot, but since I can't see his tracks and I can't seem to catch him doing it when I'm freezing frames, I'm unconvinced. Nevertheless, that is the one comment that is hugely important. A pivot entry in those turns would be a fundamental defect in his skiing that would absolutely disqualify this as great skiing. Why? Because it would mean that he would be completely unable to master hard snow conditions. Since I'm pretty sure Hilly can ski ice, I'm guessing that the pivot doesn't exist (or it is intentional).
You are quite right that people do see things differently. That doesn't mean that doing movement analysis is invalid, it just means that you are correct in being skeptical. Just because somebody thinks they see something, doesn't make it real. So how do you deal with problem? Require extra proof. In Rick's pivot contention above, I'd insist on seeing the tracks before accepting that a pivot was occuring. There might be other ways to prove a pivot from the clip as well. The important thing is to challenge people and make sure you understand their basis for claiming what they think they see. Then make your own decision as to whether you are willing to believe them.
Also, keep in mind that some MA is impossible to do without feedback from the skier. There was a fairly amusing thread not too long ago where Reilly was trying to do a movement analysis on Thomas Grande and he (along with others) were claiming that Grande was using ILE to make his turns on the basis of the fact that is inside leg was clearly extending as he moved into the new turn. The problem with that analysis is that OLR without retraction appears identical to ILE. The difference is that with OLR there is no pressure on the inside ski during transition; it is just being extended to maintain snow contact. Without being able to ask Grande what he was really doing, there was no basis for the analysis being presented.
I think that you are right in that there is no "right" and "wrong" way to ski. However, there are ways to ski that are more efficient, more effective, and more elegant. For racers, there is simply faster. All of these things are worthy goals to pursue. So is the simple fact that techically good turns also feel really great. Perhaps some of us are simply addicted.