In the early days of broadcast, a telecine was used to project motion pictures into a video camera. Rare broadcasts were filmed off of a specially built television display.
There were few reruns broadcast until two decades later when first video tape recorders came into use. But starting in 1939 live studio productions and remote broadcasts were broadcast into pubs and the homes of the wealthy, but not for long.
The outbreak of war in 1939 brought television broadcasting to a sudden halt.
Before WW2, several nascent commercial television networks in the United States broadcast ad hoc programs. After the war six stations began regular programming. Three stations in New York City, and one each in Chicago, Philadelphia and Schenectady. By 1948, four television networks, NBC, CBS, ABC, and DuMont were broadcasting over 128 stations. The networks provided affiliates and owned stations a full prime-time schedule seven days a week from 8 to 11pm, Eastern Time. During the time, local stations also started broadcast produced their own programming.