i understand that an experienced musician would notice details i would never see. And the right leadership, mentorship and good examples from senior musicians can make a positive difference. Maybe some of the younger musicians aren't getting that today. And maybe the musicians in this video had the right leadership, mentorship, &c. i've watched the video three times and think the number of hours of practice and playing of the pipes must be mind boggling and a serious example of their dedication and discipline. Like you said: "they know things."