Theatrical marketing editor David Lizmi takes us behind the scenes of ‘1917,’ the British war film directed and produced by Sam Mendes. The WWI epic unfolds in real time and was filmed to look like one continuous shot. “I thought it was a typo,” cinematographer Roger Deakins said when asked about his initial reaction to Mendes’ request. This featurette takes us right into the trenches, and walks us through the hairraising process of “one-shot” filmmaking.