https://www.youtube.com/watch?v=IooPPi1YzkM
The earliest known film comedy, Louis Lumière’s 1895 L’Arroseur arrosé (“The Waterer Watered”) is also one of the first film narratives of any kind — before this, movies tended simply to demonstrate the medium, depicting a sneeze, for example, or the arrival of a train.
This was also the first film with a dedicated poster (below) — making this simple 45-second story the forerunner of all modern film comedies.