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's coverage of the National Football League (which has aired under numerous program titles and formats) actually goes back to the beginnings of the network's relationship with the league in 1939, when its New York City flagship station, then known as W2XBS (now WNBC) aired the first televised professional football game between the Philadelphia Eagles and the now-defunct Brooklyn Dodgers football team. Even before this, in 1934, NBC Radio's Blue Network had carried the Detroit Lions' inaugural Thanksgiving game nationwide.