Paxton had earlier told how there was hand-to-hand fighting on the train as victims “literally fought for their lives”.
He said one victim, Sachin Balakrishnan, had been stabbed in the forearm and chest, puncturing a lung and “being just centimetres from his heart”.
Commenting on the CCTV footage, Paxton said: “You can see the panic, you can see the fear in the faces of those fleeing.
“In this storm of violence, and even when gripped by fear, many there on that train helped others and, as we will see, some stood tall, quite literally, against the defendant’s violent onslaught.”
Jurors also heard how Scott Green had been travelling on the Doncaster to King’s Cross train with his dog Poppy.
Paxton said: “He thought he was going to lose his life on the train when the defendant tried to stab him for the third time.
“It seems, members of the jury, that Poppy the dog, for Mr Green at least, saved the day and sent the defendant running off.
“You will hear that in an unrelated incident the defendant had previously been bitten by a dog.”