What was the very first motion picture?
The first motion picture was The Horse In Motion (1878).
Thomas Alva Edison invented motion picture in the late 1890s. His interest in motion picture started at around 1888, and the first motion picture shown to an audience was in New York City on April 23, 1896. A fun fact is that one of the first motion pictures he took (and the first one copyrighted) was of one of his employees pretending to sneeze!