Transmission questions

[Mugzee]

As I'll be changing the transmission fluid on my FL D2 4.2 very soon, I had a couple of questions that can hopefully be answered. . . .

Is the fluid change procedure on Audi pages the one I should follow or are there any others? The reason I ask is because there is what seems to be an official ZF video on YouTube which details the procedure slightly differently. I just wondered if anyone had had experience of this?

Secondly, I can buy genuine fluid and parts from the parts store and was wondering if they are the same as Audi (I assume they are so should be fine)?

Any feedback would be greatly appreciated.

Many thanks.