Judging by previous instances, you ought to put in more than just a link and also put [LINK] in the title, or else you are liable to get a bunch of downvotes.

[edit] OK, watched the first video, with people getting little rare-earth magnets put in their fingers so they can feel magnetic fields... Why not just get a magnetic ring? That way you can feel magnetic fields and don't risk medical complications and you don't have to stop for several minutes and explain every time you fly or go through one of those scanners I hear are relatively common in the US. [/edit]