I wasn’t able to ascertain anything about the author, but I’m guessing he’s Slovenian like the kids who made this film. ZVVIKS, “institute for film and audiovisual production based in Ljubljana, Slovenia,” seems to regularly sponsor animation workshops. Here’s the complete video description from Vimeo:

Short animated film based on a poem by Tim Verdinek.
“With some assistance from their mentor, the complete film was created by attendees of the animated film workshop for children, students & youth.”
Story, designs, animation and music: Urša Halilovič, Aleksa Milovanović
Mentor: Simon Hudolin – Salči
Producers: Matija Šturm and Kolja Saksida
Sound Borja Močnik
Colour corection: Teo Rižnar
Production: ZVVIKS 2012
Co producer: Kulturni dom Slovenj Gradec
Financier: Maribor 2012 – Evropska prestolnica kulture, Slovenski filmski center – javna agencija Republike Slovenije