It makes it very easy. I have a beginning, middle, and end, and I don't film for long - about 20 hours usually for a two-hour film - so it's easily watchable in a week for me and the editor. Once I know who the characters are, I only film those characters, unless somebody else forces their way into the film by a scene happening to them or we meet them by chance.

I don't want the people I'm with on this journey to feel like I'm filming them all the time. I don't want them to constantly feel as though they're being watched. So I will have the camera ready at all times, but I will only film when something is really worth filming. Those are the moments when the person being filmed is usually not aware of it.

I'm not generalizing anymore about men and women, because I think these old terms of "masculine" and "feminine" are going very fast with the rise of transgender rights that are questioning what all these categories are.

I try to make films where the audience forgets the filmmaking and gets engrossed in the story as it unfolds. I don't want them to ever feel bored, or that they're being told what to think, or to feel depressed. I don't like films about victims - I want to celebrate brave survivors like Brenda and the wonderful women in the film.

I meet all these American filmmakers that film for months and months, and it's a mystery to me. I couldn't make a film like that. I have to be very clear in what I'm doing and where it's going, and be very disciplined about what I film.

I don't have any advice at all. I think we all make the films that reflect the kind of people we are; we all make such different films. There's not just one way of doing it.

The magic of documentary is that I keep being surprised and amazed by the things I film.