Some of these things aren't ignorant, they're just opinions...or stated facts.

"That looks so weird" Is an opinion.
"People can see you." Is a fact.

Both are pretty rude. So I suggest this video be retitled "The Rude Shit People Say to Autistic Weird Fuckers."

It's ignorant to say those things to an autistic person.

They know they look weird, and can't help it. They'd stop if they could. It's like telling a fat person they look fat. Ignorant.

"People can see you" also implies that they could control it if they wanted, and should maybe think about stopping. That's ignorant.

Moving this video to messenger's personal queue. It failed to receive enough votes to get sifted up to the front page within 2 days.

Do they know they look weird?

"People can see you." May have implied something by the way this person said it but it doesn't always. It can be stated flatly as a fact, I talk that way most of the time.

Are autistic people going to get upset if I say "Your shirt is blue"? If they do, then Fuck'em I'll say what I want.