That video is liable to cause headaches! With that caveat, my analysis is more subject to error. To get better video, position the camera person downhill and ski down straight at the camera. We don't need to see many turns. Seeing complete turns with a steady picture makes life much easier for analysis.
It's cool to see your edges engage the snow above the fall line to get a rounder turn shape. With the edges engaged and good separation between your upper and lower body, you are showing appropriate angulation angles in about the 145-150 range for your speed (180 would be banked, 120 would be very high end skiing). My buddy Tony Knows your stance is good (Toes, knees nose in vertical alignment). The hand position is ok. The lack of wild hand movements indicates steady balance.
I do see evidence of too much weight on the inside ski (outside ski diverges). In your short radius turns you rush the finish with foot steering. Steering the skis is ok in short radius turns, but we prefer to see the skidding spread equally throughout the turn. In your longer turns, there is a quick edge change followed by some park and ride. We want to see all body movements be progressive throughout the turn (e.g. feet tilt for edging, ankle, knee and hip flex, upper body counter). This is easier said than done. Your turns start with an up move. As we move up the performance ladder, we want to see the initiation move come more from from the core and be more lateral than vertical. This is done adding flex of the new inside leg to your initiation movement. Again, this is easier said than done. Your turns finish with your upper body pretty square to the skis. I'd like to see you add "steer into counter" for your turn finishes so that your upper body faces more to the inside of the next new turn at the finish of your old turn.
You are at the point where you ski well enough to ski most of the mountain without much trouble, but improvement beyond this level is likely to be difficult without help. There's a 50-50 chance that a couple of simple tips could open you up to the next level of performance, but plenty of skiers at your level need to get a lot more coaching and put in 20+ days/season in order to see big improvement. Your mileage may vary.
Bamboo over the shoulder - (don't do this if you have shoulder issues, be extra careful with bamboo on chair lifts) Ditch your poles. Place the bamboo across your shoulders using your hands to hold the boo just outside of shoulder width. Ski short radius turns with the boo pointing at the side of the trail vs down the slope. Widen the turns until you can no longer keep the boo pointing to the side of the trail throughout the whole turn. From that point keep making wider turns, but minimize the amount that the boo start to point down the trail as much as possible. An alternate version of this is to hook your poles around your waist with each basket hooked into the strap of the other pole, then keep the poles pointed across the slope instead of the bamboo. This drill help to develop steering into counter. You want to get the maximum divergence between where your skis are pointing and where your shoulders are pointing just before you change edges.
Skate into the new turn - Start a new turn by lifting the new inside ski, turning the new inside ski down the hill, then stepping onto it with the new edge engaged. This drill helps to develop moving the core into the new turn as an initiating movement.
Flamingo turns (my name) - Start a new turn by picking up the tail of the new inside ski, then tipping just the tip of the new inside ski onto the new edge. Let the new turn happen. This is a harder version of the skate drill.