This is the audio/video output from a real Syzygy (Atari) 1972 PONG arcade game circuit board.
There are many videos on YouTube of things saying they are Pong, but those just aren't. Notice how the paddles don't reach the top of the screen? This is a 'feature' of the original game. Notice the game speed? its at a decent pace, not all slow like other videos.
Pong is one of the earliest arcade video games. It is a table tennis sports game featuring simple two-dimensional graphics. The game was originally manufactured by Atari, which released it in 1972. Allan Alcorn created Pong as a training exercise assigned to him by Atari co-founder Nolan Bushnell.
Bushnell based the idea on an electronic ping-pong game included in the Magnavox Odyssey; Magnavox later sued Atari for patent infringement. Bushnell and Atari co-founder Ted Dabney were surprised by the quality of Alcorn's work and decided to manufacture the game.