A 16-year-old boy was allegedly beaten up by five men for sitting on a parked two-wheeler belonging to one of the accused.
The incident was reported from Inderpuri market in south-west Delhi on Monday. The video surfaced on Thursday, three days after the assault.
Six men have been arrested. The police say they were drunk when they tortured the boy on Monday, accusing him of theft.
One of the men filmed the attack and shared the video, in which the boy is seen heard crying out in pain as he is tortured with beer bottles. He is trying weakly to cover himself with his discarded clothes. He is even seen with his hands and legs tied as he is thrashed.
He told the police that after he was thrashed, he had gone to the nearby railway tracks to commit suicide.
Police denied any such allegations and said they were informed of the incident two days later. DCP (South West) Surender Kumar said the five had beaten him but none of them disrobed him.
The attackers, who are all from the neighbourhood, have been charged with assault among other crimes.