At 9 minutes, there is a girl with a brown jacket at the right hand side back of the subway car. Yet at both 17.48 and 18.54, no girl is there-yet at 28.30 (when the team are watching the replay) she shows up again.
When hostages are taken, HRT (Hostage Rescue Team) is called in, which NYC does not have. In New York City, the NYPD ESU (Emergency Service Unit) would be the division handling the situation.
At 8min 43sec when guy pointing gun at Esposito catches him with phone online with Ryan, and takes phone from his pocket, call time to Ryan is 00:00 seconds, and his battery level is 100%, which should not be as he was nowhere near charger for a period of time, and was talking. So it is obviously a screenshot.
At 13 minutes, Jared Stone has the gun in his left hand. At 13.52, the gun is now in his right hand, as he unzips his jacket with his left hand.
Then, at 14.01 he has nothing in his right hand. Also, the video shows him opening his jacket with his right hand-which didn't happen in real time.