The documentary "Nazi Concentration Camps" is a documentary which I found in the Public Domain Section of the Archive of the United States Government. It is an official documentary report compiled from films made by military photographers serving with the Allied Armies as they advanced into Germany. The films were made pursuant to an order issued by General Dwight D.Eisenhower, Supreme Commander of the Allied Expeditionary Forces in Western Europe.
The music is licensed and copyrighted to Fred Vogels (2016).
The original footage had poor audio and no music. I remastered the audio and composed a complete new soundtrack for this documentary.