krypton_john
The pilot in the video attempted to correct out the roll-over, instead of dumping the collective which probably would have saved the ship.
Either pure lack of type training or poor skill.
dump (dump)
Transitive verb
To throw down or out roughly; empty out or unload as in a heap or mass
By 'dumping the collective lever'...do you not mean, 'lower the collective smoothly'?
Surely 'dumping' the lever would very possibly cause the aircraft to bounce on the other skid and roll in the other direction. (Not forgetting the potential risk of ground resonance)