Roughly translated (by Google) from a Russian language page I found with information about the film:
"The film "One more time!" - is a moving memory of the finest part of every person - a carefree childhood. The action takes place in Yaroslavl, 1930. The authors managed with great precision to convey the atmosphere of that time.
The film "One more time!" is the graduate work of young animators. Its authors - Alina Yahyaev, Ekaterina Ovchinnikova, Tatiana Okruzhnova - in one -and-a-half years have created a film under the guidance and in co-creation with the teacher, Alexander Petrov.
Alexander K. Petrov - a famous animator, film director and artist. Member of the Union of Cinematographers of Russia, member of the International Association of animators ASIFA, a member of the American Academy, an honorary member of the Russian Academy of Arts. Winner of two national awards (1990, 1995). He was awarded an Academy Award in 2000 for his film "The Old Man and the Sea." Alexander Petrov, creates its own unique films in the technique of oil painting on glass."
Here are some photos showing pre-production sketches and storyboards:
More works by Alexander Petrov: