The YAK has a power off glide ratio close to that of a greased brick...further worsened in this case by the enormous drag of the windmilling prop. I think it is instructive to look at how quickly the ground rushes up in the final part of the video. The video recording does not IMO give a true sense of how steep the descent was. The temptation is to unconciously raise the nose in these circumstances which is why so many for real forced approaches result in a stall/spin short of the field. A bit too fast is always better than a bit too slow in the last stages of a forced approach.