You can tell by the lack of enthusiasm that the audience has no idea what they're listenting to.
If I was there, I'd be that one guy who yells "WOO" at the beginning.
This approximates me making random references aimed at myself in school/public, like muttering "Over 9000!!!" and doodling in pixels or writing TSC on the whiteboard.
<:/
The guy farthest to your left was wearing a red baseball hat with a white front.
He's obviously the cool one.
And I like how those two guys in front of the camera were bobbing their heads in the whitest way possible the entire time.