Clever GSD, but all I could think of is that blanket thrown over all sides of the [insert preferred term]. How long would it have been before the oxygen was all converted to CO2 and the little dog suffocated? The series of events was most likely staged and monitored, but still frightening to completely cover the dog like that.
I don't know, I think there was enough air coming through the folds that hit the floor to be safe. We used to do some cool outdoor camping years ago with our Doberman, she was always cold. She'd crawl to the bottom of our zip together sleeping bags and sleep the entire night there. Looking at the video again, I think that Shepherd was about to try and hump that little one.