History of the National Football League on television
NBC was the first major television network to cover an NFL game, when on October 22, 1939, it broadcast a game between the Philadelphia Eagles and the Brooklyn Dodgers; the network was still only in its infancy, with only two affiliates, the modern day WRGB (now a CBS affiliate) in Schenectady and W2XBS in New York City. Portions of that game still survive via films, but the film is not footage from the telecast (recordings of television broadcasts did not begin until 1948). The use of a sideline camera, the sole camera used in the 1939 broadcast, would become the standard for all future NFL broadcasts until 2017; the angle is particularly suited for estimating yardage, compared to more mobile camera angles that began to appear in the 21st century.
NFL on NBC
NBC resumed football telecasts on a regular basis in 1965. On January 29, 1964, NBC signed a deal with the American Football League, paying them US$36 million to televise its games; with this and the increased, heated battle over college prospects, both leagues negotiated a merger agreement on June 8, 1966. Although they would not officially fully merge and adopt an interlocking schedule until 1970, two of the conditions of the agreement were that the winners of each league's championship game would meet in a contest (which would eventually become known as the Super Bowl) to determine the "world champion of football", and that there would be a common player draft.