Acting on a tip-off, the police raided the accused woman's flat on Tuesday evening and arrested her, the official from the city police's anti-human trafficking cell said.
The incident, that took place on November 4, came to light after the survivor's parents lodged a police complaint on Saturday evening, an officer said.
Preliminary investigation and scene of crime suggest that Ashok had asked his father Lala Ram, who had been watching some programme, to switch off the TV.
The woman gave a written complaint to the Sadar police two days ago in which she said that though the rape incident took place five months ago, the accused posted the video of the incident recently.
Based on a complaint filed by the woman, a case was registered against two men on charges of gang rape and three others on charges of criminal conspiracy, the police said.
The three accused, who also blackmailed the girl and threatened to upload her objectionable video online if she resisted their advances, have been arrested.