[stephencanon]

The rolling method is really exactly the same thing, but some people find it easier to think about reaching in for the corners after rolling, and you don't need to be tall enough to let it fall down into place (wife is 5'4" and rolls, I'm 6'4" and just reach for the far corners).

[bootsmann]

The duvet is like a parachute, you don’t need to shake it in from the top you can shake it in like a magician doing the table clearing trick.

[Semaphor]

If it's the same, then some people here posted really bad videos of it ;)

FWIW, my wife is tiny (160cm) and still does the reverse grip method