That’s interesting...Possibly you missed the research from before COVID that showed that surgeon’s blood oxygen saturation decreased when they were tested after an hour wearing surgical masks. The surgeons were just standing in one place, not running around like this girl.
Pesky things facts. They keep getting in the way.
https://pubmed.ncbi.nlm.nih.gov/18500410/
https://principia-scientific.com/neurosurgeon-face-masks-pose-serious-risks-to-healthy-individuals/
How come everyone else also wearing a mask did not have the same problem?