Source: Internet Archives, http://www.archive.org/details/nazi_concentration_camps (Internet Archives > Moving Image Archives > Movies > Feature Films > [Title]. Approx. 60 minutes, and will need several seconds to begin).
From the Internet Archive: “**This film contains extremely graphic scenes of human suffering, please exercise caution when viewing.** Compilation footage of Nazi concentration camps in the immediate aftermath of World War II. The footage was gathered by the US Department of Defense as part of the effort to conduct war crimes trials. This copy was dubbed from a video copy at the National Archives in College Park, Maryland. National Archives Identifiers: ARC: 43452 NAIL: 238.2”
This is an “official” U.S. Army newsreel describing in images and words the several “concentration camps” found in eastern Europe, and alleged to be of either German origin or under German control at the end of the War, as Allied, and here, American, military forces conquered that area.