He specifically said in the video, "It's not doing anything ...", i.e., masks don't work.
I've got an old, former acquaintance, worked for me - he was fucking terrible - he's a loudmouth, he has no background in medicine, virology, epidemiology, and he goes on and on about masks, he's still doing it he LOVES this raging asshole.
Hahaha, we might have a little get together with folks from the old company, he quietly stalked those conversations on FB, I can't wait to have it, and send him a message, "You're not invited you ignorant prick, fuck you and your shitty wife". (she's also anti-mask and works in healthcare.