Two Questions about Hillary Clinton (9/11)

Regarding the recent news concerning Hillary Clinton's bout with pneumonia, there are two questions which have gone through this writer's mind:

1.  Why was Hillary Clinton wearing dark sunglasses throughout the period she was attending the 9/11 Memorial?

 

2.  If, it wasn't for someone named Zdenek Gazda, who shot the roughly 20 second long video showing Mrs. Clinton unsteadily leaning against a concrete pole, then stumbling and her knees buckling as she was literally carried into a vehicle, would we have even know anything of this had happened?

https://www.youtube.com/watch?v=vC_bXFi2Xko