I've heard them called programmable magnets: https://www.magnet-sdm.com/2019/11/21/programmable-magnetized-magnet/ https://www.magnet-sdm.com/2019/11/21/progra

I've heard them called programmable magnets: https://www.magnet-sdm.com/2019/11/21/programmable-magnetized-magnet/ https://www.magnet-sdm.com/2019/11/21/programmable-magnetize... That being said, I highly doubt they are using one in this video.