It then cuts to a man wrapping a bomb around his waist before walking into the crowds and pulling the trigger.
New York police have issued a statement to say they are aware of the footage.They added that there is no direct threat to the city but insist there is a 'heightened state of vigilance'.
'In addition, we are continuing to deploy additional Critical Response Command (CRC) teams throughout the City, out of an abundance of caution,' Stephen Davis, a Deputy NYPD Commissioner, said in a statement on Wednesday.
He added: 'While some of the video footage is not new, the video reaffirms the message that New York City remains a top terrorist target.'
The video, which runs for nearly six minutes, includes a scene that appears to show a suicide bomber making preparations and zipping up a leather jacket.
The clip shows a brief glimpse of Times Square and then of a suicide bomber holding what appears to be a trigger, it said.