By its very nature, documentary filmmaking is tricky business. Directors are dependent on their subjects, they can't control those subjects, chances are they aren't being paid a living wage to follow around said subjects and, at the end of shooting, they have tens (sometimes hundreds) hours of footage and no script to guide them in editing a cohesive narrative about their subjects.
Yet, some of the most exciting and cinematic storytelling at this year's Sundance is coming from the nonficiton categories, so we asked the documentarians in Park City how they overcame the biggest challenges they faced in making these remarkable films.
READ MORE: Sundance Review: ‘Cameraperson' is a Transcendent Documentary Experience
"My subject, a 13-year-old nomad girl, lives in the Altai Mountains of North West Mongolia, which is the most remote corner of the least populated country on Earth. At most my team numbered five people, but we still wanted to give the documentary a big, cinematic...