Girls, help! A strange cough appeared now in the evening. I put the vi…

Girls, help! A strange cough appeared now in the evening. I put the video online. It's not really like a cough, but it's very scary. We couldn't get sick anywhere, there are no drafts at home, cold didn't give us. We maintain humidity with a humidifier. There is no temperature. Has anyone had something like this? All evening like that. Ambulance????