The video, obtained by CNN, shows the rapper, whose real name is Sean Combs, shirtless with a towel wrapped around his waist, chasing Cassie down the hall at the InterContinental Hotel in Century City.
As she tried to get into an elevator, he grabbed her by the back of the head and slammed her on to the ground.
He then kicked her as she lay on the ground motionless, before grabbing the two designer bags she’d tried to escape with.
Diddy stood over her, kicked her again, and then dragged her back to their room by the hoodie.
Cassie claimed in a since-settled lawsuit that Diddy had paid the same hotel $50,000 for the footage after the attack.
Two days later, the pair appeared on the red carpet holding hands for the premiere of The Perfect Match.
In a statement to DailyMail.com today, Cassie’s attorney Douglas Wigdor said: ‘The gut-wrenching video has only further confirmed the disturbing and predatory behavior of Mr. Combs.
‘Words cannot express the courage and fortitude that Ms. Ventura has shown in coming forward to bring this to light.’
Cassie sued Combs last year alleging rape and a range of other offenses.
They settled out of court in November for an undisclosed amount.
In a statement at the time, Cassie said: ‘I have decided to resolve this matter amicably on terms that I have some level of control,’ Cassie said in a statement.
‘I want to thank my family, fans and lawyers for their unwavering support.’
In his own statement at the time, Diddy’s lawyer said his settling the case was in no way an admission of guilt.
‘Mr. Combs vehemently denies these offensive and outrageous allegations,’ said his lawyer Ben Brafman.
‘For the past six months, Mr. Combs has been subjected to Ms. Ventura’s persistent demand of $30 million, under the threat of writing a damaging book about their relationship, which was unequivocally rejected as blatant blackmail.
‘Despite withdrawing her initial threat, Ms. Ventura has now resorted to filing a lawsuit riddled with baseless and outrageous lies, aiming to tarnish Mr. Combs’s reputation and seeking a payday.’
The pair dated between 2007 and 2018, after meeting in 2006 when she was 19 and he was 37.
In her suit, Cassie recalled an incident similar to the one caught on security footage at the LA hotel.
The suit claims: ‘In on around March Mr Combs, during an FO at the InterContinental Hotel in Century City, Mr Combs became extremely intoxicated and punched Ms Ventura in the face, giving her a black eye.
‘After he fell asleep, Ms. Ventura tried to leave the hotel room, but as she exited, Ms Combs awoke and began screaming at Ms Ventura. He followed her into the hallway while yelling at her.
‘He grabbed her, and then took glass vases in the hallway and threw then at her, causing glass to shatter around them as she ran to the elevator to escape.’
Cassie said in the suit that she managed to eventually escape Diddy and go to her own apartment, but decided to return to the hotel for fear of the rapper.
‘Upon realizing that her running away would cause Mr. Combs to be even angrier with her, and completely stuck in his vicious cycle of abuse, Ms. Ventura returned to the hotel with the intention of apologizing for running away from her abuser,’ the settled complaint said.
‘When she returned, hotel security staff urged her to get back into a cab and go to her apartment, suggesting that they had seen the security footage showing Mr. Combs beating Ms. Ventura and throwing glass at her in the hotel hallway.’
The legal claim said Combs paid the the InterContinental Century City $50,000 for the hallway security footage showing the alleged assault.
Cassie has described a years-long, torturous relationship in which he controlled her movements and subjected her to abuse.
He has always denied wrongdoing.
They met while she was recording her debut album after her smash hit One Thing.
The footage of the March 2016 incident comes just two months after Combs’ homes in Miami and Los Angeles were raided by Homeland Security as part of a sex trafficking investigation.
He is also fighting lawsuits from other accusers who allege sexual misconduct and abuse.
Combs’ sons, Justin and Christian ‘King’ Combs, were handcuffed during the raid at their father’s residence in Los Angeles.
In February, a music producer filed a lawsuit alleging Combs coerced him to solicit prostitutes and pressured him to have sex with them.
Another of Combs’ accusers was a woman who said the rap producer raped her two decades ago when she was 17.
Combs and his attorneys have denied all of the lawsuits’ allegations.
The rapper is among the most influential hip-hop producers and executives of the past three decades.
Formerly known as Puff Daddy, he built one of hip-hop’s biggest empires, blazing a trail with several entities attached to his famous name.
He is the founder of Bad Boy Records and a three-time Grammy winner who has worked with a slew of top-tier artists including Notorious B.I.G., Mary J. Blige, Usher, Lil Kim, Faith Evans and 112.