Several Dr. exchange details and views about masks against virus protection..
  They are not intended or effective for what is being proposed
 by the official fear-narrative..
Steve Kerch,  shows the type of mask that partly works (a P100) but it only works against inhaling hazards,,, not exhaling & transmission.
COVID-19: A Second Opinion Panel -- Sen. Ron Johnson moderates panel discussion with world-renowned doctors and medical experts

This Secondary Source has video clips
https://banned.video/channel/bill-gates-is-evil-
And the Full panel hearing,, (Non-Rumble Player)
https://banned.video/watch?id=61ef5090bd040115d71661bc
broadcast has ended 
full length 5 hr. video through Rumble,,  if the player loads.. (40min standby gap)
https://rumble.com/vt62y6-covid-19-a-second-opinion.html