I have lived most of my life surrounded by Cedars in the foothills of Western Washington, and have never once seen one shake like that. What did they do to cause that (since they obviously knew it was going to happen and set up the camera, I am assuming it was staged, and none of the trees around it are even moving). Most likely that represented all the pollen the Cedar had for the season being released in one fell swoop, which is incredible to look at, but not how it naturally happens, at least that I have seen.
I have seen a good wind blow pollen off evergreens in clouds like this. That being said, this tree was being shaken.
There’s someone behind that tree blowing dust