The victim, who lodged a complaint of rape, released the clip to a TV channel alleging that a close aide of Nagar's brother offered her Rs 2 crore to drop the case.
Police said the video has been sent to the Forensic Science Laboratory (FSL) for examination.
When contacted Nagar said, "We have no affiliation with the said person nor is any one from our family involved in it."
Nagar denied the charge claiming that his political adversaries had hatched a conspiracy to tarnish his image.