Thanks for asking! Oh, there are so many Soviet musical films, and most of them are really good! Austrian operettas were extremely popular in the Soviet Union, and many were televised. Two names are particularly noteworthy here: Johann Strauss II and Emmerich Kálmán. Here are some of the most popular operetta films:
Both are Kalman’s Die Zirkusprinzessin
More musical style films are:
In 70s and throughout 80s, plays by Lope de Vega and some other classical European writers had become very popular. I wouldn’t call them musicals, but there are many songs in those movies:
And, of course, I can’t miss the most popular Soviet music series The Three Musketeers. Here is the first series: href=”https://www.youtube.com/watch?v=esgo4KoyOQs”>https://www.youtube.com/watch?v=esgo4KoyOQs
Happy watching and listening!