It does look to us as though the T/R was still turning, and could likely not be windmilling for that long. It appears as though he MAY have tried to autorotate onto the building he struck with the gear and the T/R. The ship looks like it could be straightening out just before the first strike, possibly indicative of the reduced torque that would be in effect. The degree of disorientation that was likely could easily have prevented him from judging a more successful landing.
Again, praise be that they all got out.
Again, praise be that they all got out.