My Russian is a bit sketchy but I did get the gist of the film. We (daughter and I) only watched it today, after sending you the link. It is quite good. The scenes in Venice remind me of Canaletto, while the Russian outdoor scenes are straight from a Russian painting. Glinka looks just like his several portraits and there is a scene where he is reclining on a pillow, which is exacly how Repin posthumously pictured him. Pushkin looks like Pushkin and he seemed indeed to have African ancestry, which of course he did (his grandfather or great-grandfather, a little boy, was an Ethiopian prince who had been made a slave by the Turks. He was captured by Peter the Great during one war or another. Peter was so impressed with the boy that he adopted him and sent him to France to be educated at the court of one of the Louises, XV, if I remember rightly.) Gogol also appears and looks just like Gogol, as well as Dargomyzhsky, but the most impressive is Liszt, the child of German parents (originally List) who could not even speak Hungarian, who appears speaking perfect Russian, even getting the declentions right! (Maybe he can interpret for you

). That is a very funny scene, where he improvises on a theme from Ruslan and Lyudmila: hands high in the air and dropping on the keys, hair flying and so on.
The intersting thing is that Glinka's 1st opera was originally called "Ivan Susanin" (a hero who helped to expel the Poles from Russia - Whenever you hear Chopin whining about "Russian butchers occupying Warsaw", remember the "Polish butchers occupying Moscow" at an earlier date!). The Emperor (the correct title: the title "Tsar" was abolished by Peter the Great, being substituted by "emperor") was so impressed he insisted in its being renamed "A Life for the Tsar" (the action takes place before Peter). The Bolshies took exception to that and reverted to the original tiltle, but, in the film, the opera is renamed by the Emperor "A life for the Tsar". And this film was made in the '50s.
Give it a try: it is complete and free, but beware it takes 45 seconds to start!