A well-known documentary by Eino Mäkinen (1908-1987), produced by Ethnological Film, describes the ancient process of making ruuh using a Stone Age method by hollowing out aspen logs. This is a 1950 re-release of "Elettiinpä ennenkin - ruuhen synty" (We lived before - the birth of ruuh), narrated by Carl-Erik Creutz. The original version has not survived to this day.
