The video was filmed secretly through an air duct.
A videotape of a detainee being questioned at the US prison camp in Guantanamo Bay has been released for the first time.
“It shows 16-year-old Omar Khadr being asked by Canadian officials in 2003 about events leading up to his capture by US forces”, Canadian media have said.
During the 10-minute video of his questioning in Guantanamo a year later, he can be seen crying, his face buried in his hands, and pulling at his hair. He can be heard repeatedly chanting: “Help me.”
“I’m not a doctor, but I think you’re getting good medical care,” one of the officials responds.
Mr Khadr says: “No I’m not. You’re not here… I lost my eyes. I lost my feet. Everything!” in reference to how his vision and physical health were affected.
“Canadians should demand to know why they’ve been lied to.”
Mr Khadr, now 21, faces multiple terrorism-related charges, the most serious of which is murder. He faces up to life in prison if convicted.