Depending upon how old you are, you will recognize this is a reoccurring theme in works of fiction...
1998 - The Truman Show
The film chronicles the life of a man who is initially unaware that he is living in a constructed reality television show, broadcast around the clock to billions of people across the globe.
1964 - Wendy and Me
George Burns as landlord would watch his attractive young tenant on what appears to the modern eye to be a surreptitious closed circuit television transmission with hidden cameras (he also accomplished this with his "TV in the den" in later episodes of The Burns and Allen Show).
1949 - 1984
George Orwell predicts a populace kept under constant surveillance by closed-circuit security cameras that transmit footage back to Big Brother.
1939 - Television Spy