yeah, but point is more like that we do not need hard to refine ( that is why are they called rare earths ) materials from china, if those magnets were strong as neodymium ones. which they are not in video.

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problem with chemistry is most of these things are easily made in garage.

For example Slovak military is training disposal of homemade explosives / chemicals by watching NurdRage videos ;)

https://youtu.be/Zybj-mi1FP0?si=KGMUJj5l5NUt2egh&t=68

or this simple technology from 1890 used in different way is helping helping Europe to be self sufficient with energy:

https://www.tue.nl/en/research/institutes/eindhoven-institut...