This was a cute presentation. The video explains how the CD was once used by ancient civilizations and shows how they can still be used today. This article does a cover story about the video..
CDs Are Cutting-Edge Tech Once More https://www.hackster.io/news/cds-are-cutting-edge-tech-once-more-35ece9bda976.amp
"...YouTuber Aaed Musa recently got his hands on a large quantity of Mini CDs. Having been born in the 2000s, Musa initially looked at them with confusion before realizing that they are obviously ammunition for an archaic wrist-mounted device intended to slice fruit and water balloons. Unfortunately, the civilization that created this device must have existed long ago, and no launchers seem to have survived those many years. So Musa set out to recreate what it must have looked like...."