While not about the Soviet Union i don't think this sounds interesting - https://en.m.wikipedia.org/wiki/I_Am_Cuba
The film is shot in black and white, sometimes using infrared film obtained from the Soviet military[2] to exaggerate contrast (making trees and sugar cane almost white, and skies very dark but still obviously sunny). Most shots are in extreme wide-angle and the camera passes very close to its subjects, whilst still largely avoiding having those subjects ever look directly at the camera.