Please watch this video  

Well here’s an extra piece that is not being reported but I’ll add to this discussion. For 2-3 days prior to the accident n216mh’s tailboom was wagging excessively while on the ground at KJRB. This was mentioned to the pilots multiple times by other pilots, ramp agents and even over the radio by ramp agents running the radio upstairs. They reviewed the security camera footage after the accident and it clearly showed the tailboom wagging far more than any other aircraft. This footage has been provided to the NTSB. 

I initially took that as a potential weakening of the 4 bolt connection that then was allowing an otherwise perfectly balanced and working drivetrain to wag the tail. Other option was an imbalance anywhere on the tail rotor drive train was creating the wag which over time was weakening the 4 bolt connection. Once the wreckage photos showed the fairly clean break at a location that was NOT the 4 bolt connection then I moved on. 

This extra detail is pointing towards a serious bearing/coupling drivetrain issue that had been working itself for quite sometime and finally failed and became a wrecking ball to the top of the tailboom.