Josh Foster's videos:
First time in bumps: How does a skier, anxious at best, identify if their shoulders are over their knees? I'd say, "stay balanced on the balls of your feet." But, I always say that. Yes, hands easy in front. I don't like "strong stance." I like "fluid balanced stance." To many, strength implies rigidity.
Lost art of steering: Lost? Art? Anyway, he isn't steering. He can't be. He'd be breaking the law. Newton's Third Law of Motion..."When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body." To turn his feet left, he'd need to anchor against something. When skiing that would be the body which would turn right to a lesser extent due to its greater mass. We call that countering. And vice versa the other direction. If the skis turn and the body stays square to the skis, he's clearly edging so the skis turn him. A good thing, but not what he's claiming to demonstrate.
Edging Tactics: I though Big Whiteout was famous for its fog--too close to the lake. I've skied there in 3-chair fogs, when you have a hard time seeing 3 chairs up the lift. Anyway, back to Big Flat and edging. What's he telling us?...set our turn radius according to the circumstances?...OK.
Rhythm & Balance: Pop & Turn with Lots of Extension are just too much work. Why not use the same absorption turns he wants us to use in the bumps? Quicker and less work. Smear at the end...works in 4" of fresh snow. Not as well in deeper stuff, a good way to trip yourself and go splat. This is where edging really works well. Edge both skis and bank the skis through the turn in the snow much like an airplane banks to make a turn in the sky. The skis don't need to get up and out of the snow. They can stay down in the snow, they just need to flatten to release from one turn, then edge into the next turn. Flatten them when the knees are pulled up just like he does in bumps, then extend and edge the other way.
Keep your feet moving: Yes, ski with your feet. Other body parts amplify what the feet do. Foggy--I just got some Oakley Rose Prizm (sic) goggles, and they're the best I've used yet in flat light. His wiggle & scissor drills are probably OK to help a skier learn balance.
Skiing chopped or broken snow: Crud is fun! Yes to the narrow stance for a platform. Lots of energy in the legs and big hops are just tiring and wearing on the knees. Back to the retraction turns, quicker and less work, and edging the skis to slice through the crud. Note how often the camera sees the bottoms if his skis--that's edging. Steering gets the skis bounced around. Edging slices through the lumps of crud.
Reference Point: Middle of the downhill ski--YES! How do you know when you're in the middle?...when you're balanced on the balls of your feet, mainly on the outside foot. 2:12 is a good shot of how he's edging so his skis slice through this snow. I'd like his inside shoulder/arm/hand higher and more forward.
Pro-active stance: Frozen crud--yuck. Yes, keeping balanced is the only way to have anything work right. He's describing the Skier's Paradox--the skier must be very aggressive to have the control to ski as slowly as they want. Get forward, get balanced, really be aggressive with the snow in order to go with the speed and control you like. Again, no way for the skier to tell when their collar bones are over their skis. Balanced on the balls of their feet is something the skier can tell for themselves. Shins against the boot tongues isn't a goal but an indicator of how far I've pulled my skis behind me and how I'm balancing my center of mass over the sweet spots of the skis.
Strength in the stance: I'd call it fluidity. Again, many would equate strength with rigidity. And, finding the fluid point is much easier when one is on the balls of their feet.
Lines, turn shape, vision: Look as far down the slope as possible. Very important. Don't look at the bump you're on, look 2 or 3 ahead with just peripheral vision on the one you're on. Don't look at the trees, look through the gaps between the trees. Look at the tree, hit the tree. Look through the gap, ski through the gap. Be balanced and ready to turn by the time your skis come through the fall line so you can turn where ever it looks good to you.
Adding movement: Great demonstration of fluid movements. He isn't turning his feet. His skis on edge are turning him.
Keep your feet under you: Good demonstration of the benefits of angulation vs. inclination. Angulate & balance vs. incline & brace against the skis. But--he doesn't tell the skier how to achieve it nor how to tell if the "feet are underneath." 2:12 shows some of this.
Mr. Foster is Level IV. I'm Level Zip. Try his way, try mine, use what works.