I'll send a $20 Amazon gift card code to the first Reddit account that can find this video. Either the physical VHS at a reasonable price to purchase, or even better an online rip of the video.
The video was exercise set to multiplication tables. Each number was a different exercise and between numbers everyone would just walk in place. It was a family of 5 and each person did a different variation of the exercise while shouting out multiplications of the current number. The dad always did the most difficult variation and the youngest child did the easiest one.
For example, if the number was 5 and the exercise was jumping jacks. Each person in the family would do a variation of jumping jacks. The dad would probably do a full jumping jack and on each one shout 5! 10! 15! 20! etc. The mom would do a slightly easier jumping jack, each child would do an easier one down to the youngest who might just wave her arms up and down.
I think they all wore a distinctive color of leotard. Each person in a different color.