“Calling all! A man walks free,” reads the description at ZEBRA, where this film by Manuel Vilarinho of a poem by Mário-Henrique Leiria was awarded Special Mention in the Prize for the Best Film for Tolerance. The ZEBRA website also has a short bio for Manuel Vilarinho:

Born in Portugal, 1974. Graduated in Tecnologia da Comunicação Audiovisual by IPP, Instituto Politécnico do Porto in 2004. He won several awards at video film festivals and currently works on TVI, Independent Television in Portugal.

The English Wikipedia entry for the poet is similarly brief:

Mário-Henrique Leiria (1923–1980) was a Portuguese surrealist poet. Born in Lisbon, he studied at the Escola de Belas Artes. He and his fellow surrealists were involved in an absurdist plot to overthrow the dictatorship of Antonio Salazar. He is best known for his books Contos do Gin-Tonic (Gin and Tonic Tales, 1973) and Novos Contos do Gin (More Gin Tales, 1974). He died in 1980.