The Belorussian filmstudy made some awfull films in the mid of 1980's. The movie "Come and look" "Иди и смотри" Link to the movie
is a very brutal movie, even in the Soviet time it is not a historically correct in uniforms, but the Belorussian filmsutudio used in that time live animals being killed, original corpces ( the scene with the death body where the German motorciclyst is riding trough the village is natural dead body) it's awfull for scenario I think.
Just found the link to the full version with Englich subtitles
‪Come and See (English subtitles). Part 1/6.‬‏ - YouTube