Watching the video, I thought - "He's just reinvented the Navajo forked stick hogan (or sweat lodge in his smallest version)". Hogans, the traditional Navajo one family dwelling, are snug and warm, if not actually hot, in winter snow conditions.

If one is on the move, a good light weight tent is actually more practical. An alternative would be a couple of tarps,lean-to style. For my money, best of all is a rock shelter - will give you the best night ever.