Nomad... You are a good skier. I think you could be a great skier. There are just a couple fundamental things that need tackling.
First, you have dead spots in every one of your turns. You make a turn, followed by a short traverse. Rinse and repeat. This negates all of the power and energy that the ski provides. So here's what you need to think about:
1) Your should be actively turning ALL THE TIME. As soon as you stop actively turning in one direction you need to be turning in the other.
As others have pointed out you are stemming a bit in a sequential move. There are a number of issues related to that. Because you are releasing your old turn by stepping to the new outside ski (improperly), you are moving your center of mass up the hill to pressure that outside disrupting the travel of your center of mass from taking its optimal track. Additionally you are dragging your inside ski along for the ride rather than using it actively to lead and guide. [Note: Activity and pressure are independent of each other]
2) Some skiers think in terms of RELEASE>TRANSFER>EDGE (RTE). I personally embrace RELEASE>EDGE>TRANSFER (RET). But what you seem to be doing is TRANSFER>RELEASE>EDGE (TRE).
So, part of your improvement will come from resequencing your movement patterns. You will have to think your approach to skiing a little differently but it isn't as hard as it may seem. Everything is interconnected, so once you get going all the pieces will fall together in short order.
I've already spoken about continuous turns. Keep that in the back of your mind. Now, as you finish a turn you already know that most of the pressure is built up on the outside ski (whether you like it or not ). You have to release it somehow. What you currently do to release the old turn is step on the new outside ski. Instead of that, why don't you just roll (tip) the foot of your old outside/new inside ski in the direction of the new turn? Though some advocate lifting that ski and tilting it toward the new turn I prefer to keep it in the snow as it prevents your center of mass from shifting too far in the wrong direction while learning. While you're starting to tip that old outside ski to release, you can begin to retract that leg as you simultaneously begin to feel pressure build up on the new outside ski (the one you're currently stepping to). You should feel the pressure build on the outside ski as your inside continues to retract and progressively edge more and more while the turn develops simultaneously. This is where the turn shape is so important...
As you have "come around the corner" from your old turn your momentum and inertia is now modified to go somewhat across the hill. So getting the new turn started immediately with no dead spots is important because as you begin to shape your new turn the change of direction of your skis combined with the new direction caused by intertia creates the force, that when you edge the skis) creates a platform which you can stand (some use the term balance) against early in the turn. So, your turn shape contributes to pressure control in a major way.
Now back to pressuring... As you can feel the forces build you can retract (and contiuously edge) your new inside ski until you feel most if not all the pressure has transferred to the outside ski. So retraction of the inside and extension of the outside is how you manage pressure distribution. It is important to understand that if done properly PRESSURE COMES TO YOU, but in this method it will feel like pressure to the outside ski comes later than you are used to. How much later depends on your speed, the radius of your turns and how your skis load and unload.
And now back to that pesky inside ski... The inside ski leads everything and works hand in hand with the movement and trajectory of your center of mass. By keeping the inside ski in the snow and using it actively it helps pull the center of mass into position, but the other thing is that actively turning the inside in the direction of the turn creates a force that goes up to you hip, crosses your pelvis and helps to power the outside leg foot and ski. And even though the outside ski may be the primary pressure bearing ski (at the appropriate time) the inside ski still needs to remain continuously active even if it has little or no pressure on it.
Lastly your center of mass (CoM). Let the active inside ski help pull it into its proper position. It is probably the hardest thing to train as there are so many variables going on; general direction of travel, momentum, centripetal force and gravity. So for now it is most important to NEVER let your CoM travel back up the hill at all (as you will see yourself doing in the video). It's all about balancing against the combined forces that are constantly changing and trying to move down the hill.
So to summarize:
1) Turn shape. No dead spots. Let the shape (particularly at the top) help create the platform to balance against early in the turn. If the tips and tails are traveling thru the same path throughout the arc they will load like a spring which when released will create more of the dynamics expert skiers look to achieve.
2) CONTINUOUSLY active inside ski. Whether or not it is pressured it should be tipping and/or turning in the direction of the turn.
3) Strive to keep your CoM moving in the general direction of travel. It will often feel like it's taking a shortcut from the skis' arc. That is where turn shape, beginning to turn in a different direction from momentum and inertia will create the platform for you to get your skis out from under you and have something to balance against.
Sorry to be so long winded. Hope this gives you a starting place to continue your journey.