If anyone knows what is the song at 3:11, please let me know!

Also, the translation of the title is rather more wordy than the original, but it was the only translation I could think of that was grammatical and kept all of the meaning intact (explicit and implicit).

This was one of just 10 animated films released in the USSR that year, 8 of which are currently on the site. The remaining ones are "The Priest and the Goat" made by Lev Atamanov at Armenfilm, and "Three Friends", a rather impressive colour cartoon made at Lenfilm which only partly survives (and isn't publicly available, with only a short minute-long segment being online here).