Recently, a group of evolutionary psychologists from Britain's Northumbria University corralled a group of men ages 18 to 35 into a room and filmed them as they danced to a basic drum rhythm, because that's what some people get to do with their workdays. After showing the resulting footage to a group of women, the academics found that the ladies "were most attracted to male dancers who have big, flamboyant moves," according to the AP. "The movements around the head, neck and trunk were the most important," said Nick Neave, one of the study's co-authors. "The good dancers had lots of different movements and used them with flair and creativity."
He said their research was likely subjective and different cultures would have different measures for what constitutes good dancing.
So we assume, since the participants in the study were British, their preferences were shaped by this video.