DESCRIPTION:
Beatbox Jam in the Hall at the Human Beatbox Convention, part of Ether Festival at The South Bank Centre, March 2007

Identifiyed Beatboxers include :

Daq - to the right with a white hat on
BeatMuppet (green T-shirt, Mr Bungle vocals at 4:10)
Boze (wearing glasses, hidden in shadows)
Marv-Ill (doing throat tapping, freestyle at 2:55)
Skitzochronic (freestyle at 0:55)
Yasson in the white cap (back to cam) - I think

Also Zgas and TikTak