Youtube activity of "Mark H" (@markh1011) on "National Geographic" channel.

Commenter youtube id

UC7SPTPUSPyvjciLeyOsBZmA
User comments on "National Geographic" channel

459
Commenter name

Mark H
Commenter name id

@markh1011
Comments by video

"9/11 Impact Anatomy | National Geographic"
"Explosive 9/11 Claims | National Geographic"
"Total Collapse (Full Episode) | 9/11: One Day in America"
"When the Towers Fell | National Geographic"