It all boils down to risk management.
All flying is risk management as is just about everything in life. As soon as the blades start turning, there is a risk factor. That factor increases and decreases dependant on the circumstances. It's up to the Pilot to decide whether the risk is appropriate to the task. It's also up to the pilot to make that decision on behalf of his passengers taking into account their best interests rather than their wishes.
As a professional pilot (350 rated) it is my opinion that there were several instances in this video where an engine failure or other serious malfunction including jack-stall would have resulted in the destruction of the aircraft and serious or fatal injury of those on board. We all know that Turbomecca, whilst reliable, are not perfect.
Now... What constitutes the passengers best interests under these circumstances?
We've all done things like that when we're crew only on board, however we have a duty to our passengers to know what is good for them even if they don't and to make a responsible decision with regard to the risks that we expose them to.
It's only a matter of time before someone finds a video like that in smouldering wreckage of such a flight.
BD