Looks like gyno to me. And, as it looks as though he actually has glandular growth under his nipples, this would be the real-deal, not the pseudogynecomastia that a lot of kids come down with during puberty. (Which is simply due to estrogenic fat distrobution and dissapears at low enough bodyfat percentages.) This hard fact is painfully apparent throughout the video, but especially when he hits that front double bicep pose... I mean, I've been bodybuilding for a while, and I've seen a lot of gyno (and have even had to deal with some myself,) so believe me when I say that that kid has got some
hardcore gyno.
It is very, very likely that he is on the juice, or has juiced in the not-very-distant past. Don't kids these days know well enough to take their arimidex? I know that it's expensive, but so is gyno surgery...