Airline Fanatic

A visibly very disturbed passenger on a flight from London to Toronto (on board Air Canada) was caught in this YouTube post from a December 6th flight.  He is being restrained by two men on either side of him, but I can’t tell if they are inflight crew or just passenger unfortunate enough to be sitting next to him.  They do have him handcuffed though.  I wonder how long passengers had to endure this stressful stuff before he was finally subdued?