Toronto's crack mayor confronts new video

The mayor of Canada's largest city Toronto has admitted to smoking crack after months of denials. (AAP)

Toronto's embattled crack-smoking mayor says he's embarrassed by a video that shows him drunk while ranting and swearing.

Toronto's crack-smoking mayor is facing new embarrassment after video footage was published showing him in an agitated state, staggering and making foul-mouthed threats.

Rob Ford, who admitted earlier this week that he had smoked crack cocaine while on a drunken binge, said he had been "extremely, extremely inebriated" when the video was shot.

"It's extremely embarrassing and I don't know what to say," Ford told reporters outside his office on Thursday, after seeing the one minute 17 second clip.

The video purchased and released by the daily Toronto Star shows Ford staggering around an unknown living room, ranting and making punching gestures.

Watch the video on the Toronto Star website (Warning: Offensive language)

"I'll rip his f***ing throat out. I'll poke his eyes out... I'll make sure that motherf***er's dead," Ford says, in a tirade apparently secretly videotaped by someone in the room.

"I'm gonna kill that f***ing guy. I'm telling you, it's first-degree murder," he says.

This video comes after Ford on Tuesday admitted that he once smoked crack "probably in one of my drunken stupors".

The admission by the 44-year-old came after repeated denials, and six months after another video surfaced that allegedly showed him consuming the illicit drug.

The first video is now in police possession as part of an investigation of Ford's longtime friend Alexander Lisi for extortion, related to Lisi's attempts to recover the video.

Source: AAP