Answer: livetv

AnswerCrossword Clue
LIVETVMany '50s broadcasts
LIVETVMuch of "The Ed Sullivan Show"
LIVETVBroadcast with little room for mistakes
LIVETVIt goes to air without delay
LIVETV"SNL," e.g.
LIVETVSome real-time broadcasting
LIVETVBroadcast shown as it happens