What is Video?
'''Video''' is a [[technology]] that records, transmits, and displays moving [[image]]s. The images may be recorded onto some [[Storage medium|medium]] such as [[videotape]]. The recorder may be a separate machine such as a [[videocassette recorder]] (also called a VCR) or built into something else such as a [[video camera]]. A popular 20th century [[videotape]] format was [[VHS]]. It was used by many people to record [[television programme]]s onto [[Videotape|cassettes]]. This is usually an [[analog signal|analog]] format. In the 21st century [[digital recording]] is used more often than analog recording. By extension, a [[video clip]] is a short [[movie]]. A [[music video]] usually [[Movie star|stars]] someone who recorded an (audio) [[album]]. One purpose is to [[Promotion|promote]] the album. == Making and showing video == Video is made using a [[video camera]]. A camera is an [[electronic device]] that takes [[light]] from the real world and makes it into pictures. A video camera is like a camera, but takes many pictures very fast to make it a video. Video is shown with a screen. A screen can either be a [[Computer monitor|monitor]], a [[projector]], or a [[television]]. The purpose of a screen is to turn video information into light. == History == === Analog video === When video technology was first made, it was made for [[televisions]]. At first, it was for [[mechanical television]]s, but then [[cathode-ray tube]] televisions became more common. The technology was [[analog]]. === Digital video === [[Digital]] video came after analog video. At first, the digital video was not useful because the [[bitrate]] (how quick a picture moves through a [[wire]]) was too high. After [[data compression]] was made, digital video became more useful than analog video. == Properties of video == === Frames per second === Frames per second is a number which means how quick a picture is shown to a person watching the video. Videos are just pictures shown one by one, but very very fast. So the frame rate is the numb