I think in this case it's rather more indicative of the fact that nothing's really selling well right now, considering KAT-TUN's still at #1 with Going!, which wasn't selling well to begin with, but still, good for them!
Ikemen is a Japanese word for a cool/good-looking guy. Yunhak says that he's an ikemen and no one responds. Then they kind of fail at doing a dance. In the second half of the video they basically ask them to divide into the ikemen and the non-ikemen and they argue about it in Korean. Ikemen are on the right and non-ikemen on the left. Too bad, all my favorites are on the left :(
When I watch their interview videos I start to think I'm a genius and I've suddenly learned how to speak Japanese. But then I realize, no, their Japanese is just pretty basic -.-;