Christopher Vourlias Variety has been given exclusive access to the trailer for “Chernobyl,” a big-budget action film about the aftermath of the nuclear power plant meltdown, directed by heartthrob actor and debut helmer Danila Kozlovsky (“Vikings”).Following on the heels of HBO’s Emmy-winning series, “Chernobyl” is the first major Russian feature film to depict the fallout of the explosion that rocked the nation and raised alarms across Europe.