One video showed guards punching detainees and forcing a dozen to strip from the waist down.
Interior Minister Bachana Akhalaia resigned Thursday after a television station broadcast a video of guards beating and abusing inmates.
In the video, the guards appear to have surrounded a deportee and are holding him in his seat.
Surveillance video indicates guards did not do at least eight required checks on Castro the afternoon and evening before his death and falsified the logs, according to the report.
They said the video showed guards discussing the growing unrest and saying that if something happens they will go to a compound at the centre "and take cunts down".
But John Elferink, the NT attorney general, who on Tuesday was stood aside as corrections minister, told Four Corners he had not seen the video of guards teargassing the youths and remarking they would "pulverise the fuckers".
In the video, prison guards are shown to have marched dozens of inmates into a closed area, forcing them to crouch into a fetal position before firing rubber bullets at their backs and targeting some with what appears to be pepper spray.
In the video, the guard approached Omar's kebab cart aggressively, saying something I couldn't make out.
The video showed the guards collecting a bucketful of contraband electronics, including cellphones.
