There is some similar footage in Story 55, Film ID 8 from the Imperial War Museum (Source# A700/307/4). See also Story 2650, Film ID 165 for another video transfer of this film, created in 1987. Original MARS accession number: 145x-12
Nazi men dragging corpses by the feet to a mass grave/pit, more bodies in the grave, preparing for burial. Supervised by armed British solders in FG.
Belsen: Nazis bury the dead