I'm not going to pick the many points I probably could to varies contributors to this thread but I think it would clarify a lot if everyone opened the link and viewed the video in the OP. Assuming the video is of the actual spot of the fall it looks like a very poor setup indeed with wooden rungs nailed or screwed onto the BACK side of the tree as compared to the position of the hang on stand. In the video I see no evidence of a safety tether, haul line or anything.

http://www.twcnews.com/nc/triad/news...-accident.html