This first video is “Hedgehog in the Fog”.

An award-winning animation feature by Yuri Norshtein. Winner of the following awards:
- Outstanding Film of the Year (London UK 1977)
- Winner of 2nd Prize (Sydney Australia 1978)
- Winner of 3rd Prize (Chicago USA 1977)
- Tokyo All time animation best 150 in Japan and Worldwide: Hedgehog in the Fog “№1 Animated film of all the time” (2003)

This animation is really excellent. Suddenly, I’m curious about Russian animation, and I find “Polygon”:

An animated film by Anatoly Petrov of 1978. An outstanding feature in term of realistic technique. It won the following prizes:
- Official Selection Oberhausen, Germany 1979
- First Prize Yerevan, USSR 1978

Ah – it becomes clear that these are both from the same production studio: Soyuzmultfilm. From Wikipedia:

Soyuzmultfilm (Russian: Coюзмультфильм, translated as Union Animation) is a Russian animation studio based in Moscow. Over the years it has gained international attention and respect, garnering numerous awards both at home and abroad. Noted for a great variety of style, it is regarded as the most influential animation studio of the former Soviet Union.

…and continuing:

The Studio was founded in 10 June 1936 under the name Soyuzdetmultfilm (Союздетмультфильм – abbr. from Union Children’s Animations). The name was changed to Soyuzmultfilm on 20 August 1937. Initially comprising only a few scattered workshops, Soyuzmultfilm grew quickly, soon becoming the Soviet Union’s premier animation studio. The studio produced exclusively traditional animation until 1954, when a “puppet division” was founded and the first stop motion-animated film released. The puppet division would later also make cutout-animated films.

During the Soviet era, the studio employed a maximum of over 700[1] skilled labourers and released an average of 20 films each year (the highest number was 47, in 1973).

The 60s, 70s and 80s saw the release of many films whose characters became an integral part of Soviet culture: Winnie-the-Pooh (Винни-Пух), Crocodile Gena (Крокодил Гена), Karlsson-on-the-Roof (Карлсон, который живёт на крыше), The Musicians of Bremen (Бременские музыканты), Three from Buttermilk Village (Трое из Простоквашино), Nu, pogodi! (Ну, погоди!), Hedgehog in the Fog (Ёжик в тумане), The Mystery of the Third Planet (Тайна третьей планеты) etc.

The variety of animation styles and the unprecedented degree of artistic freedom given to its many animators made Soyuzmultfilm perhaps the most diverse of the world’s major animation studios.

Soyuzmultfilm’s creativity was fueled in part by the unique conditions of the Soviet Union which made it possible for the studio to disregard the commercial appeal of its films. Because animators were paid by the Academy of Film regardless of how well or how poorly their products sold (though they were not, in fact, “sold”), they were free to pursue their artistic vision without giving a thought to finances.

Whoah!