While the B&W movie of Bill Harrison and me was indeed taped in 1969, we played the first ping-pong games in December of 1967 in preparation for a January 1968 visit by Teleprompter execs whom we had invited and considered as possible licensees. We then thought that videogames would best fit the cable business. Teleprompter was one of the biggest cable networks in the 1960s. RHB.
After the demo you see some photos of the Brown Box Replica produced by Mr. Baer in 2003. Many thanks to Mr. Baer for providing this historic footage. You find his page at http://www.ralphbaer.com