The first guy that sang (at the 0:19 mark) looks a lot like B1A4's Gongchan or maybe even Himchan from B.A.P

The guy at 0:41 looks a little like Kiseop from U-KISS.

Then there's Yunho's twin at 1:28. Like holy freaking hell, they look so alike, I'm not even kidding you! I feel like they've just cloned Yunho and put his clone in this group. :0

I like the song, though. It's pretty good. They seem like a promising group.