Have no idea whether this is legit, but here is a better video than the one in OP showing the black threadlike things. This video says they are not only in swabs but also in masks. I don't know what they are, but I'm pretty sure I don't want to be breathing them. Esp given that they are made in the same country that poisoned our dog food years ago. They are not entitled to the benefit of the doubt IMHO.
https://ugetube.com/watch/found-on-masks-swabs-moving-black-strands-parasites-what-the-heck-are-they_nm87P6KNcM5WKM1.html
Have no idea whether this is legit, but here is a better video than the one in OP showing the black threadlike things. This video says they are not only in swabs but also in masks. I don't know what they are, but I'm pretty sure I don't want to be breathing them. Esp given that they are made in the same country that poisoned our dog food years ago. They are not entitled to the benefit of the doubt IMHO. https://ugetube.com/watch/found-on-masks-swabs-moving-black-strands-parasites-what-the-heck-are-they_nm87P6KNcM5WKM1.html
so what are the strands? Other than freaky and obviously intended to kill us all?