The trio were swimming at the top of Shannon Falls in Squamish, British Columbia on Tuesday when they slipped and fell into a pool 98ft below, local police siad.
John Willcox of Squamish SAR, said they have responded to a number of accidents in the pools, though adds that this is the first fatality he has responded to.
A family member of Mr Gamble confirmed his death to The Associated Press. They released a attractive and emotional tribute to the adventurous trio on their YouTube channel (watch above), and asked their 1.5 million followers to please respect theirs and the victims' families' privacy during the hard time.
At almost 1,100 feet (335 metres), Shannon Falls is the third-tallest waterfall in British Colombia.
He wrote: "Life isn't about responsibilities, tough decisions and hard work, it's about feeling bliss and living in the moment".
Last year, Gamble, Lyakh and another High on Life member, Justis Price Brown, pleaded guilty to walking on a sensitive hot spring in Yellowstone National Park and other crimes at parks in the western United States, the Courier reported. On their Facebook page, the YouTubers told that they had been "friends since high school and had been making videos ever since".
Gamble and Lyakh were jailed for a week in 2016 for breaking the rules at Yellowstone National Park in the USA, disturbing a fragile area by going off a walkway.
Mangelsdorf said the family understands Scraper slipped and fell and that her boyfriend, Lyakh, tried to save her before Gamble attempted to help his childhood friend.
On Thursday, federal police in Canada said search and rescue teams in British Columbia recovered the bodies of the three people.
In 2016, two out of the three adventurers, Gamble and Lyakh, were forced to apologise after they walked on a sensitive hot spring in Yellowstone National Park.
A GoFundMe page has been set up to support Ms Hansen.
"The world has lost a great deal of light with their passing", Parker Heuser said in the video published Friday morning.
"Unless you have knowledge and the right equipment you should not be up there", she said. The group says its goal is to encourage others to see the world.
The accident happened on Tuesday, July 3 at Shannon Falls in BC and their bodies were found along with an underwater camera.
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