A Canadian previously identified by Global News as the narrator of an ISIS execution video has now admitted to his role in the terror group's propaganda.

Researchers Jeff Weyers and Camie Condon said they had a “high degree of confidence” that they had positively identified the execution site.

Researchers say they have identified the Facebook page of the Abu Sayyaf militant who beheaded two Canadians in the southern Philippines in 2016, and it has deepened the mystery about him.