Not criticizing, as he has a pretty good setup.

With the high profile and completely open front, I just wonder what the effect of shifting winds would be. I also question the temperature differential between the peak of the shelter and the ground where his feet are. I don't think you can overstate the need to keep your feet warm in winter survival situations.

I have tried various materials and configurations in my winter camps and I believe that a shelter configured from the same materials, but low and horizontial in front of a fire with a log or stone reflector opposing would be more wind resistant and have a more consistant temperature inside.

I have not been in a true survival situation in winter, but to prepare, I carry a folding saw. a nylon poncho, 50 ft of 550, a silver sheet, and an orange AMK double sized sheet. The nylon poncho with a sapling frame is the shelter, lined inside with the silver reflector sheet, and then a bed of leaves, grass, or pine needles, I would wrap up in the heatsheet in front of the fire.