Kam McLeod and Bryer Schmegelsky, whose bodies were found last month, appeared «cold and remorseless» in the footage, police say.
Two teenage fugitives thought to have murdered three people in a killing spree across Canada shot a series of chilling films in which they said they planned to kill again.
Kam McLeod, 19, and Bryer Schmegelsky, 18, made six videos before they killed themselves while hiding in a forest in Manitoba, police said.
In footage found on a digital camera near their bodies, they admit murdering university lecturer Leonard Dyck, American Chynna Deese and her Australian boyfriend Lucas Fowler.
The videos chart part of their journey while on the run as police and the military carried out a huge manhunt for them, in a case that gripped the country for weeks.
In the first video, Schmegelsky admits the three murders and goes on to say they are planning to walk to Hudson Bay, hijack a boat and sail to Europe or Africa.
By the time they film their second video, they had reached a fast-flowing river. Schmegelsky says they may have to kill themselves and McLeod agrees. Once again, they say they are responsible for murdering three people.
In the third video, which lasts 32 seconds, Schmegelsky says he and his accomplice have shaved in preparation for their deaths. He also says they plan to kill more people and they expect to die in a week.
The fourth video is 19 seconds long and the teenagers describe how they plan to kill themselves.
Another video is of the pair saying that, as their last will and testament, they want to be cremated.
Kevin Hackett, assistant commissioner in the Royal Canadian Mounted Police (RCMP), said they appeared «cold, remorseless» in the videos.
He added: «We have no evidence that leads us to identify what the motive was.
«If there was a motive, it is gone with the accused.»
Mr Fowler and Ms Deese may have been targeted because they were stopped on a remote northern British Columbia highway with vehicle problems, according to the police chief.
«There is no real clear understanding of why they were ultimately targeted, other than the fact they were at the side of the road,» he said.
Their bodies were found near the Alaska Highway on 15 July, about 300 miles from where that of Mr Dyck’s was discovered four days later.
The digital camera used to make the videos belonged to Mr Dyck.
Police have said they will not release the videos, but Schmegelsky’s father has been allowed to watch one after signing a non-disclosure agreement.