The best documentary victory for Mstyslav Chernov’s “20 Days in Mariupol” was a harrowing first-person account by The Associated Press journalist of the early days of Russia’s invasion in 2022. The award was applauded for exposing the brutal devastation of the war and the message Chernov had sent to the world from one of the biggest stages. Ukrainian President Volodymyr Zelenskyy said he was grateful to the team for creating the film and