Video title is, "All things are possible if you believe" and her video history reveals that this could pretty much sum up the theme of her whole channel. Well, that's obviously flowery language, because we still ultimately have to work within the bounds of our biology. Barring the outliers who may be born with an extra set of teeth due to some mutation, humans simply cannot regrow wisdom teeth once they are removed. That's strike 1.

However, she does not respond to any questions or gives any proof of anything.

...and that counts as strike 2 and strike 3.

Bottom line is that she's a nutty lady who is either making wild claims to draw in her audience, or she just has a low standard of proof herself.

I've also heard about people who claimed that their wisdom teeth grew back, but probably they just had multiple sets of them, because I can't find anything about wisdom teeth actually growing back.

However, the human body can grow teeth later in life, it's just not something you can control. (Look up teratomas if you're interested, but warning it's NSFL) Maybe once in the future.