Having planned the engineering tests for and then flown the rolls loops and splt S maneuvers for several helicopters, I can assure you that anyone who tries these things in a teetering rotor helo is suicidal.
The margins between "success" and breakup of the aircraft is near nil, anything out of the ordinary will lead to loss of control, rotor contact with the fuselage and catastrophe.
That 407 shown maneuvering is a far piece better in rotor control power than a Robinson, but still considerably less capable than a Boelkow. The roll to the left invokes a strong yaw at the 270 degree point (I have seen thast in other helos, too) and that is what got away from the pilot in the clip.
Most helo aerobatic maneuvers are good for bar talk, but of little use in operations.