"Hypo", meaning low; "glyc-", meaning sugar; and "emia", meaning of the blood. "Low sugar of the blood". (With apologies to chubbyemu.)

Since "typo" comes from "typography", it roughly means "symbolic". So "typoglycemia" should mean "symbolic sugar of the blood". Low typos in your blood would be "hypotypemia".

I have no idea why "typoglycemia" refers to a human ability to autocorrect, but it brings me joy, so I'm not going to question it ^_^

Funny that we know the same obscure youtuber.