he is using very strong magnet, aka
neodymium magnets.
they last way longer than regular magnets, they are expensive too.
you can get them on amazon/ebay watch for frauds/.
https://www.google.com/search?q=neod...agnets%20motor
here is more info.
https://www.youtube.com/watch?v=5Z4Bh4mRUzA