Police say a brawl between a passenger and a bus driver was the cause of the bus plunging off a bridge in south-west China. However, Liu did not get off and later asked the driver to stop the bus when she realised she missed her destination.
The clip, which was posted on the Weibo social media site, showed a passenger assaulting the driver, which then caused him to lose control.
As she continued to assault him, the driver swerved into oncoming traffic and hit a auto before breaking through the crash barrier and plunging into the Yangtze River, the longest river in Asia.
Rescuers recovered the wreck of the bus Wednesday night.
Investigators said the 48-year-old passenger was upset at the driver for missing her stop.
More than 70 rescue boats were deployed to the scene, reported China Daily. Two people were missing.
Witnesses said they saw the bus swerve over to the other side of the road before hitting the barrier and falling into the river, according to BBC.
Police examined nearly 2,300 hours of surveillance videos along the bus route to determine the cause of the accident which gripped the nation.
But the new footage shows the driver was being hit by a passenger and then struck her back.
In the video, a female passenger approaches the driver, hitting him directly in the face with her phone.
The driver, whose left hand was on the steering wheel all the time, used his right hand to turn the bus, taking the vehicle, at a speed of 51kph, into the opposite lane.
Security footage from a bus which crashed into a river in China has revealed that the driver was fighting with a passenger moments earlier.