One of the best films of 2019 (in a bizarrely good year – Parasite, Portrait of a Lady on Fire, I mean wow). Whether you like war movies or not (I don't), this is one of the most well executed movies I've ever seen. The plot is almost secondary to the work of art this film is. Maybe this is a spoiler, but it simulates the one-shot (no cuts) thing. Here, it really adds. The film only works if you buy into the tension, and this style adds to that by making you conscious of the process at work – you are nervous not only for the characters, but also the actors and cameramen; one mumble, one trip, or one extra standing in the wrong spot could ruin the whole thing (or so the film leads you to believe). Worth a watch for sure, even if just a study of brilliant execution. You have to give credit to Sam Mendes, the cinematographers, and the editors here – really brilliantly made.
Spoilers now. The first visible cut in the film takes place after William is presumably shot. After this cut, there is a definite tonal shift in the narrative – instead of haunting, eerie music that builds tension, we get more heroic, orchestral sounds. In addition, there's this odd little scene where William is hiding from the Germans who chase him through a ruined city and encounters a woman and a baby. It seemed out of place, and his behavior seemed unnatural, and the scene comes right after a dramatic chase, swelling with heroic music (a possible nod to the heroism at Osgiliath in Return of the King, but I digress), in which William is shot at maybe 20 times but is never hit. Altogether, I propose the second half of the movie (after the dramatic cut) is some sort of dream sequence that takes place after William's death. The first half of the movie focuses on the collective effort, while the second half focuses heavily on the individual heroism of William and begins to glorify the war. The tonal shift in the movie is punctuated by the cut – once again, the process of filmmaking complements the plot of the film. Anyway. Great movie.