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This is form a 1979 promotional LaserDisc that I found it is for 1980 model year Buick's.
At the beginning of this disc you will hear some audio tones, these where used to program the PR-7800 LaserDisc player, and you will also see single frames of what is on the entire disc as well as still pictures of each model of Buick available that year
This WAS the first interactive video experience, the on board CPU in the PR-7800 allowed you to program the viewing and interact with the disc using the remote control. The PR-7800 was intorduced 3 years before the IBM PC-XT
In 1978 GM contracted with Pioneer and MCA/DiscoVision to put the Pioneer PR-7800 LaserDisc player into its dealerships, the discs where to be used for demonstrations as in this disc or for training purposes.
Now in the early days of laserDisc manufacture there was a very high failure rate, sometimes as high as 85% during the mastering/pressing process, so that left a lot of sides of discs that where unusable. Well these where used to fill the blank side of a disc, the "dead" side was then coated with a special plastic that was clear to the human eye, but it would not reflect the laser beam, thus the side would not play. Well the coating can be removed with rubbing alcohol, which is what I did.
These reject discs will ONLY play on the older style of laserDisc player that uses a laser tube