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Video is an electronic medium for the recording , copying and broadcasting of moving visual images . [ edit ] History Video technology was first [ citation needed ] developed for cathode ray tube (CRT) television systems, but several new technologies for video display devices have since been invented. Charles Ginsburg led an Ampex research team developing the first practical video tape recorder (VTR). In 1951 the first video tape recorder captured live images from television cameras by converting the camera's electrical impulses and saving the information onto magnetic video tape . Video recorders sold for $50,000 in 1956, and videotape cost $300 per one-hour reel. [ 1 ] However, prices steadily dropped over the years; in 1971, Sony began selling videocassette recorder (VCR) tapes to the public.