As my ski technique improved after I became an advanced skier, instructors started talking more about hips. Meaning after lessons with more focus on feet, ankles, knees, and lower leg position. I already knew a few exercises for loosening hips. These videos gave me some other ideas.
This video is by The Ski Club, which is based in the UK but offers services worldwide. For instance, they hold ski camps in Austria. Jack Evans is BASI Level 4.
Tom Gellie is an Australian coach who founded Big Picture Skiing. His interest is in body mechanics. The video is a sample of the type of videos people who become clients can learn from. He is APSI Level 4 for alpine and telemark skiing.