Do you know the old saying "Loose clips sink tips"? Oh, never mind.
You're turning your feet with ease, you have great speed control and you're having fun on a steep run. We can see you making an effort to close your stance width up in the second clip. In the first clip, you have a wide stance width, but this is appropriate for the technique you are using.
For the speed that you are going, using wedge christie turns and doing a lot of skidding, that wide stance helps to give you braking power and powerful lateral balance.
Your biggest issue with stance is fore/aft balance.
We need to see more body mass in the red zone. With your body this far back, you're going to have to do a lot of pivoting and skidding. We also see no ankle bend whatsoever. We want to see a taller stance with the nose and knees lined up over the toes instead of the shins.
Exercises to help you get more centered include: thousand steps, thousand shuffles and traverse tip tapping. Thousand steps is making rapid tiny step moves throughout the whole turn. Thousand shuffles is similar, but instead of picking the skis up, you shuffle one ski in front of the other back and forth rapidly. Traverse tip tapping is tapping the tip of the ski on the snow while making a straight traverse. Start with tapping your uphill ski first, then work on tapping the downhill ski.
Another area you can work on is moving forward during turn initiation. Your pole touches using just a flick of the wrist are great. But you're not using the pole touch to cue forward movement. An exercise you do to help add this movement to your skiing is called leapers. This is where you make a turn by jumping in the air off your old edges, turning the skis in mid air and landing on your new edges. The key to this exercise is leaping downhill into the new turn.