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In page YMCA:

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"Futsal" started in 1930 when Juan Carlos Ceriani [fr], a teacher in Montevideo, Uruguay, created a version of indoor football for recreation in YMCAs.[1] This new sport was originally developed for playing on basketball courts,[5] and a rule book was published in September 1933.[citation needed] Football was already highly popular in the country and after Uruguay won the 1930 World Cup and gold medals in the 1924 and 1928 Summer Olympics, it attracted even more practitioners. Ceriani's goal was to create a team game that could be played indoor or outdoor but that was similar to football.