What did the first moving picture depict?

The first moving picture, also known as the first film ever made, depicted a galloping horse. This was captured by Eadweard Muybridge in 1878 using multiple cameras to capture a series of photographs that showed a horse in motion. These photographs were then projected in rapid succession, creating animation or a moving image. Muybridge's work was groundbreaking as it offered visual proof that all four of a horse's hooves leave the ground while galloping, which was a topic of much debate at the time. Thus, the first moving picture showed a galloping horse, demonstrating the possibilities and potential of motion pictures.