A man who videoed Toronto police officers threatening to seize his cellphone for recording an arrest has filed a formal complaint.

A day after a video was posted online in which a Toronto police officer tells a bystander filming a police arrest that the “(suspect) is going to spit in your face, you’re going to get AIDS,” the police service issued an apology on Twitter.

Toronto police are investigating after a video shared by a man appeared to show an officer Tasering and planting his foot on an assault suspect as he yelled, "Stop resisting," before two other officers threatened to seize the man’s phone while he recorded the arrest.