That last video gives a much better picture of what went on.....
Helistudent, as a general principle of risk management, hazard avoidance and minimisation are a better bet than emergency action. Saves having to use those superhuman pilot skills you may (or may not) have. See ShyTorque's post for the particular detail. Another phrase you could think about is "situational awareness".
Have a think for yourself (with the benefit of hindsight) how you would have prevented this one. Only downside would have been that the landing would have taken a few seconds longer and involved a longer walk for the pax. A small price to pay in a training exercise.
Another one for the ever-growing HF/CRM video libraries.
RIP, very sad.