Question: When did the first video recorder come out?
qaPairs: question: What year was the prototype of the video recorder invented?
answer: 1953
question: When did the first home video recorder come out?
answer: 1963
question: When did the first digital video recorders come out?
answer: 1999
question: When did the first commercial video tape recorder come out?|What year was the first successfull video recorder invented?
answer: 1956