He made the confessional statement before a Dhaka Metropolitan Magistrate Court.
The accused, Sirajul Islam Sajib, 22, was arrested from East Shewrapara on Saturday while his mobile phone containing a total of 36 video clips of the changing room was seized, said Additional Deputy Commissioner of Cyber Security and Crime Division of Dhaka Metropolitan Police Nazmul Islam.
A female employee of Aarong’s Banani outlet along with several other colleagues filed a complaint with the division recently in this regard.
According to the complaint, Sajib had been blackmailing the victim by sending her the video footage he recorded using a selfie-stick from outside the room.
Sajib had lost his job from Aarong last year after complaints of recording secret videos raised against him.