"Holler" as double entendre (?) in new Indie film

Here is what the Los Angles Times' Katie Walsh had to say about the movie "Holler," an indie film attracting attention these days.  It is set in director Nicole Riegel's hometown, Jackson, Ohio, population 6,397, in the Appalachian part of the state, and it's partly autobiographical.

“Holler” is an unflinching autobiographical work about what it takes to lift oneself out of this marginalized life. It’s not just the merits of intelligence or hard work for someone like Ruth, but a willingness to sacrifice the only things she has, everything she’s known.

Shot on Super 16mm on location, there’s a gritty realism to Riegel’s work, found in the film grain and the dark abandoned buildings where Ruth and Blaze strip copper wire from the ceilings, working as a part of an illegal scrap crew. Blaze has sent in Ruth’s college application, and her acceptance ignites the dream in both of them that she might escape. All they need is a little money, and so they turn to the menacing scrap dealer Hark (Austin Amelio). With him, they find companionship and the promise of profit, despite the inherent dangers.

One gets the sense of that "holler" refers both to yelling--a cry for help--and hollow, a valley, of the Appalachian variety.