http://home.datacomm.ch/akdh-dok/E3TAXI10.RM
http://home.datacomm.ch/akdh-dok/E4SITE11.RM
The first one shows Henryk Mandelbaum in Rome. He was a member of the Jewish Sonderkommando in Auschwitz-Birkenau and one of those prisoners who had to do the dirty jobs in the gas-chambers and crematoria for the SS.
The second shows him explaining his former workplace in Auschwitz.

Henryk Mandelbaum and the ruins of crematorium V