The Fatal Descent of an Mi-8 | Military.com
That's a very interesting video, not so much from the perspective of the entanglement, but from the perspective of the ensuing tail rotor failure. Particularly because that state existed for a rather long time allowing for detailed study.
Dumb-low-hour-guy observations/questions follow: it would appear from the slow rotation and the descent rate that the pilot attempted to put the ship into as low a torque state as possible. However why did he not try to use some forward speed to obtain some stabilization from the tail surfaces, in an auto or otherwise?