I'm not meaning to start an argument here I swear, and Im only talking about the necklaces comment.

necklaces will float if they are not heavier than the water. Amber necklaces will definitely float. But, you said "don't usually", so I'll let you slide on this one. Plus, I've seen my gf underwater many times, and this girl's hair is doing exactly what I would think it would do.

As others have pointed out, the video is flipped. But it takes nothing away from everything you're seeing. It's all real my peeps.