Yep. Pretty much what skinerd said is spot on. If I were to paraphrase;
"A skier that is progressively increasing their edge angle will continuously tighten their turn shape."
By performing inclination, then knee angulation, then hip angulation, this allows a skier to continuously increase their edge angle. However, if we don't incline and go straight to hip angulation, we will reach our maximum edge early in the turn and lose the ability to increase our edge for the remainder of the turn. When we can no longer increase our edge in a turn, we can't control our turn shape as well.
"A skier in constant motion will carry the energy build up into the next turn."
You know how subway trains have that pole in the middle for people to hang on to. If you ran towards that pole and grab that pole, you would swing around that pole quite easily and naturally. Your energy has been converted from running to swinging. However if you ran, stopped and then grabbed that pole, you would have to make the motions of swinging yourself around the pole. Reaching your maximum edge too early is kinda like that. You can't move any more because you've reached the highest angulated position too early. So you've 'stopped' and all the energy build up sort of dies. If you were constantly in motion, the energy can be used to launch/ incline your body into the next turn. You can still incline even if you lost all that energy. It just takes more effort.
In the video, Skinerd is manipulating turn shape by controlling his edge angles but skiing funky fall lines is always a bit tricky. You make a turn and discover that the next turn has to be slightly different so you adjust on the go accordingly.
A side note: In my experience at least, skiing feels its best when we can perform symmetrical turns. Skiing asymmetrical turns always seems a little 'off' to me. From my observations, snowboarders don't seem to suffer that.