From your video, this is a rubidium magnet, which generally refers to neodymium iron boron and has relatively strong magnetism.
Sintered NdFeB permanent magnet materials have excellent magnetic properties and are widely used in electronics, electric machinery, medical equipment, toys, packaging, hardware machinery, aerospace and other fields. The more common ones are permanent magnet motors , speakers, magnetic separators, computer disk drives, magnetic resonance imaging equipment and instruments, etc.