Don' t come too close!
The first sequence shows an obviously happy couple on the beach of inaccessible North Sentinel Island - inaccessible to non-Sentinelis, that is. In a following sequence one can see a Sentineli picking up a coconut with what is clearly an iron pick axe. The Sentineli use iron, either hammered from salvaged scrap metal or received from the Indians.
Clearly visible in this video is the increasing nerveousness of the Sentineli, not to get involved with the outside visitors. The last sequence shows a man making an obscene gesture towards the Indian gift givers - as if to say "we now have your coconuts, now ... " However, the same gesture was made by another man when the visitors arrived so we do not really know what it means
