In this rare 1966 demonstration film, John W. Wentworth of RCA explains the features and properties of RCA's newest videotape recorder, the TR-4. Ampex introduced the first broadcast VTR in 1956 and revolutionized the TV industry, by replacing filmed kinescoped recordings of TV shows with 2 inch videotapes. Two decades later, 2 inch recorders were phased out as the industry turned to higher quality and more cost effective 1 inch recorders.