I'd err on the side of caution and say no. Quicksand itself isn't really that dangerous to be bluntly honest. read more
What actually kills in relation to quicksand are things like exposure, and drowning caused by rising tides. Because of this I'm doubtful he actually died. If he did then we are all horrible people for watching that video. *edit* The guy is definitely not dead. The video was uploaded in 2010. read more