Haha they should've just played it on their iPod again for the crowd. Song is a very basic catchy track and these guys couldn't seem more less enthused to be playing in a band.
Is there even a crowd in this video? I know there is security and shit, but no one whatsoever seems to be moving besides the band. No wonder they seem to so unenthusiastic to be performing. You don't even hear anything from the crowd until the end.