I wasn't a backer of PoE, but, i bought the game from gog. I was really interested in seeing the documentary about the making of the game. But, i can't access it. I thought it was available to backers and people who bought it, is that correct? I don't see it in my account. How do you access it? Thanks.

It's only available to backers or on Champion edition or higher (not basic hero edition)