About the film
Don't Worry, the Doors Will Open is a Ukrainian-Canadian documentary film, directed by Oksana Karpovych and released in 2019. The film centres on the Soviet-era electrichka trains that are still in operation in and around Kyiv, and the poor and working-class commuters who still use them on a regular basis.
From the film's Wikipedia article (CC BY-SA 4.0).