The film is a well-executed attempt to record the transient youth impressions of the aging generation of the Soviet baby-boomers. Or rather the inevitable fantasising about them 20+ years later. Not that it makes it any different from any other generation which has ever lived.
Just as in the end of a news hour, there's a 60 second feel-good segment, in every generation, there's its own feel-good story. The scrutiny of how realistic those dreamy fantasies of the past are is beyond the point. Relaxing in the backyard's arm chair with a glass of well-deserved glass of wine reflecting on the past is of course a part of the drill.
In the end, this patriotic narcissistic drivel could have been "Ya shagayu po Berlin (1964)" or "Ya shagayu po Hiroshima (1964)" full of love, spring vitality and romanticism. Which is of course fine as the life obviously goes on.
And perhaps it's fine. It depends on the viewer's outlook. But for some, the film will be clearly interspersed with visual and conceptual references aggrandising and beautifying what the country has gone through in the preceding 50 years. A sort of the Soviet Union of Amnesia that is. A common propaganda "feel-good" trick in a wide range of other tricks in the toolboxes of various Ministries of Truth across the globe.
One thing is for sure: this is a movie done by the power which won the war, so history is written accordingly. Small but curious detail.