Collective pitch reduction aids in arresting the yaw rate but may cause an excessive rate of descent.
So this guy is about 40-50 feet up in LTE with nil airspeed and you think lowering the collective will save his aircraft.
The decision to reduce collective must be based on your assessment of the altitude available for recovery.
Ah ... so the FM implies there may be situations where lowering the collective is futile or highly dangerous (from the video I'd say it's 50 feet with nil forward airspeed).
1-4 response is regurgitating the FM?
Read my post carefully. If you can find these in the FM, let me know.
Cheers.