Tragically lucky to have captured that, so that investigators have a very good idea what happened. It's clear part of the tail section with tail rotor broke off and the pilot was probably attempting autorotation down, but if the rotors hit the tail they would have been damaged and any fractures that developed would soon be causing separation. The R44 only has two rotor blades, I believe, not four. What you saw happening was that the helicopter went inverted and the rotor blade then bent downwards (up in an inverted position) and the blades impacted the remains of the tail boom and destructed. You can hear when they hit that tail boom assembly.
You can see that it is rotating about the rotor blade shaft, which is what will always happen to a helicopter, due to the engines torque without a tail rotor to offset that torque. That's why you have to be right there in a split second, to shut down the engine if you lose a tail rotor, to help offset that adverse torque and hope it was in time to allow the helicopter to autorotate down without starting to spin around itself, before pulling on the collective at just the right moment and height above the ground to slow the descent and allow for a landing you can hopefully walk away from. But a tail rotor loss almost allows means you better have jam in your pockets, because you're going to be toast.
Robinson makes an R66 which has a turbine engine, but if the design is all the same, which it looks like, these will also suffer from the same problems the others suffer, when flown outside of their prescribed safe limits. The problem is when the stick is pushed too hard and quickly forward, it tilts the helicopter far forward and the blades may well not have time to unbend enough/get back into a safe position, not to strike the tail boom assembly. A tail strike can happen in other helicopter, not just Robinson's, if not flown within its designed safety parameters. Only twin rotor copters, don't require a tail rotor, because both rotor blades offset each other's torque or in other words, cancelling it out. Very sad.