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 the continuous image changes more than 24 frames per second, according to the principle of visual persistence, the human eye cannot distinguish a single static picture; It looks like a smooth and continuous visual effect, and such a continuous picture is called a video. Video technology was originally developed for TV system, but now it has developed into various formats to facilitate consumers to record videos.

With the development of network technology, recorded video clips exist on the Internet in the form of streaming media, which can be received and played by computers. Video and movies belong to different technologies. The latter uses photography to capture dynamic images into a series of still photos.