I distinctly having seen an educational children's TV program in the late 1980s on German TV, probably ZDF and probably imported from the US. The scenario was similar to "3-2-1 Contact", with a fictional setting of some characters interacting in a studio set with "film inserts" explaining topics. However it had a gimmick in which they had some sort of robot character that would demand a disk to be inserted into it. AFAIR the disks were stored in a cabinet in the lower part of the robot and had to be inserted into it. AFAIR the discs were roughly the size of an LP record or a LaserDisc, but they were in caddies. They could have also been WORM discs.
Things that this is not:
"Das rot-weiß-rote Wunschkonzert" (a.k.a. Wurlitzer): An Austrian "video on demand" program where people could call up and demand video clips (typically music videos, but also other stuff) to be played from LaserDisk. There was also a modified Jukebox that would play Laserdisks and the host occasionally had to select a number from it.