With no confirmed original artist or release attached to this short clip, Sleeping City circulates mainly as a user-shared soundboard entry rather than as a track from a known album or film. Its twelve-second length and gentle, atmospheric character have made it easy to reuse as background music in short-form videos, where creators need a mood-setting bed that does not compete with speech or visuals. Because it is simple, calm and instantly recognisable as a night-time city atmosphere, it continues to appear in relaxing edits, study sessions and slow montages shared online.