[monster]

OK, woman in video, the thing the duvet goes on is -surprisingly enough, called a duvet. The opening should go at the foot of the bed (waits for massive cellar argument about correct placement of duvet cover opening...) and why would it have a zipper? it's sheet material.

I turn my cover inside out (if it's not still inside out from when I took it off and washed it), then put my arms inside and grab the two corners furthest from the opening one in each hand. then I shrug the cover down over my arms and over the duvet so it turns the right way around as it goes and the top two corners stay correctly positioned. But I can see how the rolling method would work too and might try it someday to see if I like it better. But the bedding is already changed and washed for this week.