Watched it twice on board on my returned flight last week, I can say the experience is different when you are watching it on board than on youtube at home.
Yes agree that they finally change the 15 years old safety video!
But the new one is way too long that it looks like a MV (maybe thats what they want to do). There are few part that you only see the Kpop stars dancing and singing. Yet it may be bored for frequent flyer but for people who rarely take KE, it is definitely a new experience and attractions as i heard people sitting next to me were discussing the dance and even try to follow the move.