Mstyslav Chernov: Mstyslav Chernov. Director: 20 Days in Mariupol. Mstyslav Chernov was born in 1985 in Kharkov, Ukrainian SSR, USSR [now Kharkiv, Ukraine]. He is a director and cinematographer, known for 20 Days in Mariupol (2023), 2000 Meters to Andriivka (2025) and Frontline (1983).