In my previous blog. I pointed out there that it is EXO who's practicing their new dance and not choreographers. 

you can see it here for more photos/proof >> http://www.asianfanfics.com/blog/view/1140916 

i was right in every member, it was really them. SeKai in the beginning, Baekhyun is the one wearing gray pants, Chen is the one wearing shorts, Xiumin and Sehun both wearing the same style of jacket and Suho is the one who did the 'crazy' circling thing with members holding them.

Can I promote myself as an EXO-L now? haha

I guess i knew them more than I know cos I only consider myself as Sehun's fan :D