Marketing number refers to a kind of self-media whose main purpose is traffic or benefit (free and sharing are not the main purposes).
Video generally refers to various technologies that capture, record, process, store, transmit and reproduce a series of still images in the form of electrical signals.
When continuous images change more than 24 frames per second, according to the principle of visual persistence, human eyes can't distinguish a single static picture.
It looks like a smooth and continuous visual effect, and such a continuous picture is called a video.