The Pondering Physics Teacher

A magnet is released at the top. Why does it drop so quickly initially but slows down at the lower portion? The video below shows what happens between the two lower plates in slow motion.

Even IKEA is selling a device that utilises EMI. No more power banks? No more messy wires? Image from Digital Trends (https://www.digitaltrends.com/mobile/best-wireless-chargers/) How does it work?