Watch Free Online HD Moviesjoy. An investigation of Leni Riefenstahl’s infamous film production of “Tiefland” during the Holocaust, one which used Sinti extras under forced labor conditions. After filming finished in 1944, these extras were sent to Auschwitz. Nina Gladitz interviews the survivors and perpetrators, wondering if Riefenstahl knew this would happen at the end of production. Tiefland was filmed from 1940-1944 but was not released until 1954. Leni Riefenstahl sued Gladitz over the documentary.