The film made its TV debut on CBS November 3rd, 1956, and was an annual staple on that network every winter from 1959 through 1967 (apart from 1963, possibly due to the Kennedy assassination wreaking havoc with the schedules). From 1968-1975, The Wizard Of Oz aired around Easter on NBC before returning to CBS from 1976-1998. Wikipedia has a very detailed page about the film's TV history.
Our first chance to tape it was February 27th, 1981, and of course we had VHS tape A1 ready to roll.
All I can find on YouTube relating to this broadcast is a commercial which aired two nights previously, just prior to the Grammy Awards (which must have bummed out all the Enos fans):