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 CBS
On November 25, 1965 (Thanksgiving Day), CBS featured the first color broadcast of a regular-season NFL game, the traditional Thanksgiving Day game at Detroit. It was only the second time that the network's first color mobile unit had been used (it had been used a month earlier to cover the attempted launch of an Atlas-Agena, which was to have been the rendezvous target for the Gemini 6 space mission). Only a handful of games during the rest of the season were shown in color, along with the NFL Western Conference Playoff, the NFL Championship Game, the Playoff Bowl and the Pro Bowl. In 1966, most of the network's NFL games were broadcast in color, and by 1968, all of the network's NFL telecasts were in color.