On the topic of whether demonstrating early angulation is good or bad, I would say that it can be good, depending on what you're doing. Steve suggested that the exaggerated video might be misleading, and I agree partially with that. Too much blatant early angulation would be contrived and wrong. On the other hand a lot of what we're talking about is an internal sense of balance that is hard to show without making an exaggerated demonstration. Feeling your balance move out over the inside edge of the outside ski requires an internal sense of balance that will inevitably result in visible angulation and a maintained sense of balance on the outside ski.
The feedback I keep getting from lots of respectable race coaches and PSIA examiners too is that too many skiers are diving to the inside too much. They go kind of weightless and let the skis carve around and catch up to them. Its an addicting feeling. Its not necessarily the best technique. Seems it has become a big epidemic in the current generation.
Mentally getting the concept of establishing balance earlier on the outside ski rather than dive bombing to the inside and waiting for the skis to come to you is what early angulation concepts are really about. The truth is that a good skier will not appear angulated early on, which is what I think Steve is concerned about; but they will feel the same sense of balance I'm talking about over that outside ski, that almost feels like you are kind of starting the early stages of angulating. As the turn forces build and the edge angles increase, the angulation will build and become much more visible.
Moving towards the outside early is an internal balance concept. Demonstrating early angulation and getting students to do that will help them to feel that internal balance.
But on the other hand, I get what Steve is saying about it looking a bit contrived. But we do a lot of exercises in order to get people to FEEL things, even if the end result will not necessarily look the same as the drill.
I will also say, its very hard to demonstrate this kind of balance skill at slow speeds and it will fundamentally require you to angulate a lot early on in order to stay in proper balance. At higher speeds it would not be that exaggerated.