I’m sure others have noticed the change in sound from the tail rotor right before the climb was initiated, i thought the tail rotor had gone into one of the palm trees at first but was just the angle in the video.
I wonder if this noise was from a failure of a pitch link and the sound was the tail rotor blade fluttering for lack of a better term? Seems like this would reduce thrust on from the tail rotor by half, in turn causing the yaw.
Then the vibration of the flutter caused the blade attaching hardware to fail and separate, followed by the rest of the assembly?
FltMech