From the Untold History of Japanese Game Developers DVD. A visit to the BEEP warehouse in Saitama, Japan. BEEP is one of the biggest dealer of Japanese computer games. Includes a tour of many of their incredibly rare titles, as well as some gameplay of some of them running on live computers, including Panorama Toh, Space Harrier, and Mario Bros.
This video is age restricted since there are some shots of some adult products. NSFW of course!