Hi Nechesh,
I have very bad short term memory but I'll try and recall nevertheless
The footage I saw was from a contemporary documentary on Discovery Travel and Adventure channel on satellite TV, probably made as recent as one or two years ago, though I only saw the documentary a few months ago. I think you might be able to get that on cable TV over there.
It was either Globe Trekker or something else.
I'm not sure if this particular dance was enacted for a tourist audience but if i could recall correctly, it was in a temple compound.
The dancers attempt to attack the witch Rangda and ended up stabbing themselves instead. A few things I noted, one, the skin and muscles on the chest becomes taut just before the dancers push the tip of the blades (with some force it seems!) often causing it to bend or flex.
I didn't get very clear views of the keris used. From afar they look like simple tilam upih or tilam sari straight blades, with simple tubular balinese ukiran, some so makeshift that they look like knife handles. I'm sure no pusaka was harmed during filming
If there's one thing the Tahitians and the Balinese share, it's the Austronesian genetic and linguistic roots (or Malayo-Polynesian in some older books) so I wouldn't be surprised at the parallels. Trance dances are probably a residue of pre-Hindu animism practised by the Balinese and other communities in Southeast Asia.