Eh. The more I think about it, the less I remember braces.
It’s not like they disappeared or something. Mandela Effect people are really, really weird.
The Mandela Effect presumes that people always remember things 100% accurately. But they don’t, people misremember things, or don’t notice things all the time. You’re transcribing information into meat, essentially, it’s a very malleable process, and things get messed up. With the Bernst(e)[a]in bears thing, I do remember it as stein, but that’s probably because stein is a very common suffix in surnames, I didn’t read the title closely, and the font is strange. Alternate universes aren’t needed to explain stuff like that. That said, I still think the phenomenon is very interesting.
Edit: Just watched the video, that is pretty strange, but it’s not proof of an alternate universe.