The cargo plane with tail number N99131 which they call A DC-3 is actually one of the military variants of a Douglas DC-3. More specifically that particular aircraft was built in 1942 as a C-47A-65-DL by Douglas at Long Beach, California, USA. In October 1943 it was put into service with the United States Army Air Force. After the war it was used by various airlines and other commercial applications in Australia and the USA.