Tribe on Papua New Guinea meets white man for the first time. Filmed in 1976.
Update: Here is some of the original footage without the new age soundtrack. LiveLeak footage starts around 4:15. Also: epic 80s talkshow set is epic.
Update 2: Here is the original film by JP Dutilleux. Apparently first contact was in 1993, not 1976 as the LiveLeak claimed.