This clip is from a 1972 Soviet film "The Dawns Here Are Quiet", which was nominated for an Oscar in the Best Foreign Language Film categoryin the same year. The story of the film is based on Boris Vasilyev's novel of the same name http://en.wikipedia.org/wiki/The_Dawns_Here_Are_Quiet
This video clip was for the writer of "The Dawns Here Are Quiet", Boris Vasilyev, who passed away in March of this year. He is considered the last representative of the so-called "lieutenant prose", a group of former low-ranking Soviet officers who dramatised their traumatic World War II experience. http://zh.wikipedia.org/wiki/鲍里斯·利沃维奇·瓦西里耶夫