Ryker Gamble, Alexey Lyakh and Megan Scraper were part of High On Life, who post videos of their travel adventures.
It's understood Scraper slipped into the falls at some point, where there was a strong current, and Gamble and Lyakh jumped in to save her.
The High on Life crew had traveled to many countries before, including Bali, Croatia, Nicaragua, Thailand, Greece, and Peru, perBuzzFeed News.
Royal Canadian Mounted Police said they received a call about three people swimming in one of the pools at the top of Shannon Falls, about 36 miles (58km) north of Vancouver.
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The remaining members of the group made an emotional tribute to their friends in a video on the High As Life YouTube page.
According to AP, search and rescue teams found Gamble and the two yet-to-be-named victims, who had gone over Shannon Falls, the third-tallest waterfall in British Colombia.
A family member of the travel vlogger confirmed to The Associated Press that he was killed at Shannon Falls on Thursday.
The group is known for making globe-trotting videos and attempting daring stunts and heart-racing activities such as diving off 32ft diving boards, hiking daring cliffs, and jumping off waterfalls. They were with a larger group of friends, when it's believed one slipped.
The group has run in to trouble for their dare-devil antics. They pled guilty to walking onto the Grand Prismatic Spring, the largest hot spring in the United States, which has a fragile ecosystem and on which visitors are not allowed.
Gamble and another man were sentenced to seven days each in prison after returning to Wyoming to face justice. Brown was fined but not given jail time, according to Times Colonist. In an attempt to get the flawless shot, we acted in a way that doesn't reflect our respect for the environment we were trying to capture'.