Definate rotor strikes.
Helicopter coming in from the right hand side of the Airbus.
I would (very roughly) guess at the relative speeds giving an approach angle of something like from the A320 pilot's 11 oclock, and anything from the 2 o'clock to the 4 o'clock for the Mi8 pilot.
First blade (rotating clockwise seen from above) strikes the lower shallower cut, then second blade comes in deeper and shears off the top of the A320 tail.
Alternatively, the A320 was parked, and the Mi8 hover-taxied into the back of it from the 7 o'clock.......