Lawyers for the athlete said the video, which emerged the week his trial resumed for the murder of Reeva Steenkamp, was commissioned by his defence team and obtained illegally.
In the footage aired by Australia's Channel 7 the double-amputee is seen crossing a room on his bare stumps, wearing a tank top and tight black shorts, his hand clenched in the air as if ready to fire a gun.
The 27-year-old is seen screaming and crying for help, and carrying his younger sister Aimee down a flight of stairs, as he acts out his account of the minutes after he shot Steenkamp.
The video was made by the Evidence Room, a US company based in Cleveland, Ohio, that specialises in forensic animation.
The Evidence Room was hired by the defence team in October 2013 to digitally depict the sequence of events early on Valentine's Day last year, when Pistorius shot his girlfriend four times through a locked toilet door.
Brian Webber, a lawyer representing Pistorius, said in a statement the video was "obtained illegally and in breach of the non-disclosure agreement with The Evidence Room."
"Channel 7 purchased this footage unlawfully," said Burgess, adding that the broadcaster had agreed not to air the material until the end of the trial.
"Whilst we cannot imagine how any of the footage would not support Oscar's version, we will only be in a position to comment further once we have had the opportunity to study what has been aired," he said.
Fifty-three percent concluded that Pistorius was guilty, and 47 per cent that he was innocent.
Legal observers say it is now unlikely that the prosecution will be able to introduce the video as evidence when the trial resumes tomorrow.
Stephen Tuson, an associate law professor at the University of the Witwatersrand in Johannesburg, said the origin of the footage is important.
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