El Sartorio is the name of the earliest surviving pornographic film. It was produced in Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

 in 1907 and is possibly the first use of extreme close-ups.

Plot

Three young women are bathing in a river. This leads to them having sex with each other. Then the devil appears and forces one woman to perform oral sex on him. Then he has sex with all three.