裏うらビデオ

noun

black market adult video; underground porn video

Refers to illegally produced or distributed adult videos, often sold through underground channels.

• 彼かれは裏うらビデオを買かって警けい察さつに捕つかまった。

  He was arrested by the police for buying black market adult videos.

noun

bootleg video; pirated video

Can refer to any illegally copied or distributed video, not necessarily adult content. Less common than the adult video sense.

• その映えい画がの裏うらビデオがネットで出で回まわっている。

  Bootleg copies of that movie are circulating online.