I looked up the vid and there's a lot of people in the comments dunking saying they're women and under diagnosis of autism is a problem, which leads to the higher number of male identifying individuals getting diagnosed, which leads to researchers looking for reasons why that is that isn't the misdiagnosis problem.

As for the connection to Second Thought, he used to do pop science vids before the whole communism thing on the same channel. Many of his subs are still from that period, so the Youtube algo put 2 and 2 together and suggested this other pop science channel to you.

"The unexpected connection" = there is no connection. How unexpected!

Everything I Don't Like Causes Autism