Okay, I can understand @ShortLived's frustration in the matter, with all this bullshit going on; So, I'd like to try to answer some of your questions, if possible. Now, you're correct, with certain metals, yes you can magnetize them with a magnet, these would be *ferrous* metals, like carbon steel, & cast iron. Other metals, like aluminum, brass, silver, gold, etc. you cannot do this with, because they are *non-ferrous.* Essentially, a magnet will not be attracted to them. Modern-day keys, as @ShortLived stated, are made of brass, so this wouldn't work. As I said in another comment, she could have some shitty steel key. It could also be bullshit. She's the only one I've seen just using metal, not an actual magnet. In my opinion, there's no way every one of those videos was faked. Either way, I agree. Jab bad.