Because Pirou is almost mysterious for a pornographic filmmaker, credit history is often given to other films for being the 1st. Based on Patrick Robertson's Film Info, "the earliest pornographic Movie which could surely be dated is usually a L'Ecu d'Or ou la bonne auberge" manufactured in France in 1908. https://directory-expert.com/listings12938636/the-2-minute-rule-for-video-on-demand