There is some similar footage in Story 48, Film ID 7 from the Imperial War Museum (Source# A700/304/3). See also Story 2654, Film ID 165 for another video transfer of this film, created in 1987. Original MARS accession number: 145x-12
Nazis (stonefaced) dropping women's and men's bodies from edge of pit.
Belsen: Nazis bury the dead