Rainboe
I notice the helicopter early on snaps into what looks like a sudden 90 degree roll or change of pitch (depends where the camera was pointing, and it seems to be a very mobile one!). Can someone answer how this is possible in a helicopter- changing attitude at that rate? Wouldn't the main rotor disk hit something?
I think that it's more likely that what you see is a momentary vertical gyro toppling of the camera turret. I can't believe that any helicopter has that rate of roll - let alone a two blade head type.