Leading edge up, is the “By The Book” way but very few Rev fliers do it that way, as leading edge down is so much more secure.
I’m guessing you have the old VHS quality DVD that also demonstrates the perils of launching “off centre” of the window. I think this demo was produced for the absolute novice at a time when the Revolution kite was a very new concept and for a total novice a leading edge up launch is much easier, but if you are able to flip your kite over to launch, LE down, is a much more secure parking position.
Oh and BTW. I see you are in Australia and I believe Rev fliers are a bit “few and far between” bit if you get a chance to meet up with one (or better still, some) experienced Rev fliers, you will progress so much faster, and when us Rev fliers get together, THAT’S WHEN THE FUN STARTS.
Good Luck and Welcome to the Darkside.