This clip is from State Funeral
The grand spectacle of the USSR's memorial ceremonies for Joseph Vissarionovich Stalin. It's slow cinema for the first hour as hordes of mourners fill the streets of Moscow and slowly file into Pillar Hall to catch a glimpse of Stalin's body lying in state. Then the funeral procession transports the coffin to Red Square where Stalin is laid to rest next to Lenin himself.
It's stunning to witness the degree of Stalin's cult of personality. His face is on banners everywhere, his giant statues tower over swarming humanity below. Given the intense display of support, you might not expect Stalin's popularity to plummet a few years later when De-Stalinization removed his statues, renamed his cities, and reburied his corpse in a less dignified location. To his credit, Khrushchev saw how the grave crimes of Stalin demonstrated the grave dangers of excessive leader-worship. He sought to bring about (some) reforms to the Soviet system. Most socialist countries followed the example of the USSR. North Korea is a notable exception, and the Supreme Leader's totalitarian dictatorship continues to this day.