Let's not call it scare tactics, but stupid suggestions. Masks only slow down the penetration of C-19 particulate through the mask. Even a 99.97% efficient HEPA filter mask is based on 0.3 micron (300 nm) particles. Well guess what, C-19 particles are 70 to 90 nano-meters (nm) - 70 to 90 nm particulate is going to get through filters with efficiencies based on 300 nm. And here we are talking about HEPA filters and not the surgical masks or cotton masks that most people wear that a lot more inefficient - doubling up those types of masks will do little other than slow the particulate down a little more.
Supposedly this smart MD knows all - when putting out this type of video, he should use real data - vs. saying things like a lot more. And he talks about children getting sick - the last time I checked, the vaccine is not approved for children under 12 yoa.
And yes - I am fully vaccinated - it may not prevent getting the C-19 virus, but it is significantly decreases your chances of dying. I am in the nuke business and wearing PPE is the last step in the protection process. How many classrooms or hospitals or homes have increased their air exchange rates - but of course, exhausting the air in your home vs. recirculating will cost more money for AC (or heat in the winter).