Skz post the dance on yt shorts sometimes, just like they did s-class. Also ppl learn dances at different times. Something that I recommend for when your learning new K-pop dances is that after you learn whichever part you wanna learn, you can wait a couple hours or a day and then practice the dance with music, but start at 0.5 and work your way up to 1.0. Also you can watch the dance a couple times before you learn so it can stick in your head and so it won’t be very hard :)