BASE jumpers don't use reserves anyhow. He screwed up the pack job as the parachute rotated ( at 0:07) when he released and faced him toward the cliff. The parachute wants to drive forward by design the result being the cliff cutting off the airflow into the ram-air and it collapsing (repeatedly)
He's lucky for the chute snagging on the outcrop because the situation was irreperable.
Occupational hazard.