It is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media. It was first developed for mechanical television systems, which were quickly replaced by cathode ray tube (CRT) television systems, but several new technologies display devices have since been invented. It was originally exclusively a live technology. Charles Ginsburg led an Ampex research team developing one of the first practical video tape recorder (VTR). In 1951 the first tape recorder captured live images from television cameras by converting the camera’s electrical impulses and saving the information onto magnetic video tape.
Many analog and digital recording formats are in use, and digital video clips can also be stored on a computer file system as files, which have their own formats. In addition to the physical format used by the data storage device or transmission medium, the stream of ones and zeros that is sent must be in a particular digital video compression format, of which a number are available.