Brazilian Allessandro Kauffman, who shared the video on Facebook, documented the entire trip - from the time the excited visitors boarded the boat to the Island, to the sense of panic when they witnessed the eruption when leaving the island.
Warning: Distressing content
Police said 47 people were on or near the island when the volcano erupted, eight have since died and eight more people are thought to still be on the island. Police said there were no further "signs of life".
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The video showed passengers arriving happy on the scenic island. Things were calm, and some took selfies as they walked towards the crater.
The tourists had finished the trip when footage showed them witnessing the aftermath of the eruption from on board the boat.
Kauffmann, who had travelled to White Island with his partner Aline Moura, said they left the island and it "wasn't even five minutes before it erupted".