weird masked worms

[Sergey777]

Hello everyone!
Recently, many videos appeared on the Internet in which people examine protective masks under a microscope and find there strange organisms (or not organisms?) that resemble black worms, in some I also saw white ones ...
what it is?

 

[Sergey777]

yes, I almost forgot .., the most important thing:
in one video, the fact that they react to a radio signal was noticed (when one of the experimenters brought a walkie-talkie to them and turned it on, they froze and after a few seconds continued to move, as soon as he turned on the walkie-talkie, they again zap)