Hey, I appreciate contstructive criticism! Working on re-wiring those synapses.
@JamesB, I see you are a new member. Welcome to SkiTalk. You have come to a good place to talk about ski technique.
You are skiing a line that goes straight down the hill, your skis stay in a very narrow corridor, and you are keeping your torso facing downhill as the skis point right-left. Skiing that line well is an advanced skill.
That line can be skied in different ways.
As
@KingGrump said, you are making windshield wiper turns. That's one way to ski that line, but not a good way.
Watch your video full screen and set the speed as low as it will go. Look at the skis only.
Notice how far the tips travel left-right. Not far. They stay pretty much lined up with your head.
Notice how far the tails travel left-right. Much farther. Both tails travel out beyond your body.
The tips of the skis are the pivot point for the rotation your skis are making.
This is why these turns qualify as "windshield wiper" turns.
Skiing this way is commonly called tail-pushing. Tail-pushing is a dead end path leading to low levels of control when the terrain and conditions are challenging. Because the tails are pushed out and are rotated while flat to a late edge, the whole top half of the turn has little or no edge engagement.
The top half of the turn is something you will want to use to advantage in your turns in general. You'll need to know how to engage the skis before they get to the fall line. Using the top half of the turn is an important factor in advanced skiing. The habit of pushing and rotating a flat tail can make learning to get early tip-to-tail engagement all that much harder.
Work hard now to replace tail-pushing with another movement pattern, and strive to keep tail-pushing out of all your turns.
There are other movement patterns you can explore.
Maybe other instructors will suggest them here.
You could start a thread focused on what to do instead of tail-pushing in the ski school forum. This is the video and photography sub-forum, which is an odd place for this kind of discussion.
Lessons with a high level instructor would be the best way to purge and replace tail-pushing.