vysotsky's last wife was french-born, though she was ethnically at least part russian, her father fled during the soviet revolution. but you could look at it as a long history of a weird kind of friendship between the two countries: during the french terror french nobility fled to russia, establishing and strengthening burgeoning francophone tendencies of russian aristocracy. then during communist terror in russia, russian nobility fled to france, establishing the fifth column there, but also perhaps ensuring and cultivating soviet-french relationship through 20th century.

i'm pretty sure everyone had a copy of emmanuelle on vhs at some point, but very much within the cultural sphere i was talking about in op. like speaking of emmanuelle, there was a handful of porn movies that the entirety of europe, france and late perestroyka su watched, that americans never heard of.

the secam bit might be relevant, but i distinctly remember pal/secam switch on both the tape player and the tv. i think maybe the technical followed social, La tulipe noire was played in soviet cinema in the 60s and it was a huge huge success.