The footage, which has not been used in the athlete’s murder trial, shows Pistorius walking through his house on his stump and miming aiming his gun.
The Sunday Night documentary also featured Pistorius’ voice as he re-enacts shouting during what he says he believed was a break-in at his Pretoria home.
Pistorius is currently on trial for the alleged murder on Valentine’s Day last year. He claims the killing was an accident but the state case is that he deliberately shot Steenkamp after they argued.
Channel 4 News has removed the footage from our website after Pistorius’ defence team raised issues around how the Australian network obtained the footage.
During the Australian show viewers were also asked to vote on whether or not they think the Paralympian star deliberately shot his girlfriend. The documentary also featured interviews with Sttenkamp’s parents and her best friend.
For the key points from the Pistorius trial, click here.