I have a bunch of experience with ASTM B117 salt fog testing of various metals in the aerospace industry. That guy did put some effort in, but he doesn't really give any details. When he said he added salt to speed up the process, how much did he add? Some of those other guys on youtube do the same and add so dang much they make the whole test meaningless because it takes to to an extreme that just doesn't mimic anything one would find in the real world. Chlorides (salt) are all kinds of bad on metal with a couple different chemical mechanisms for the damage they inflict and if just done willy nilly you don't learn a thing. The standard is a 5% sodium chloride concentration and it will utterly destroy most any finish is just a couple days if it's not perfect. It seriously will jack things up, so take these "tests" with a big dose of salt!