Really the only thing new here is the specifics. It’s been pretty well known that the big calorie burner when at rest is keeping warm, make your body work harder to keep warm burn more calories.
I remember an old Mike Douglas show over 40 years ago when he had some obscure health advocate pushing this very idea. His protocol was to start by turning the heat way up, and go naked around the house. Then slowly turn the temperature down over a few weeks to get used to the cold. Eventually you’d get used to sub 60 degree temps and the pounds would shed. At the time it made sense, even though the guy seemed to be a nut of sorts.