This is my first post on here in quite some time, but I discovered it, almost by accident. I am a subscriber of the Museum of Television Production Music (http://www.tvpmmvault.com), and recently a collection of pieces from the NBC Background Library were added. I was aware of this music because I had posted
that used the theme, so I recognized it immediately when I heard it. It also corroborates a story posted in the comments of the YouTube video, which said that the music had been provided by NBC. According to the record label, the collection dates from about 1970, and the full 2:16 track is available for listening through the TVPMM site.