When it comes to impressive achievements in filmmaking, “1917” deserves to be near the top of the conversation. This war film, which unfolds in two hours of real time, is shot to appear as one continuous take. Thankfully, it is so much more than just a technical gimmick. The showiness eases up as the emotional weight of the story unfolds, but it’s still hard not to get stuck on the challenges and manner of the moviemaking rather than the characters that should be the focal point of the film. Set during the First World War, the story follows Schofield (George MacKay) and Blake (Dean-Charles ...