WOW, this zoo dive had all the ingredients for a sketchy skydive: no plan, no control, no attempt to break off or track away, no clear airspace before deploying a parachute. Oh, and no shoes.
He was wearing a camera though. Check.
I don't know what the initial plan was for this 3-way jump, but it looks like the jumper filming POV video loses control on his back. By the time he flips on to his belly, the lower jumper deployed his main at 7,000, which nearly resulted in a mid-air collision with an opening parachute.
Plan the jump and jump the plan.