The four-minute-long video clip shows six million protesters swarming over empty roads and highways, attending impromptu rallies in downtown Hong Kong calling for the present Chief Executive Leung Chun-ying to step down.

The protesters stayed in the streets throughout the night, many choosing to sleep on the roads, as part of the "Occupy Central" campaign.

The footage has been uploaded to HK Apple Daily, a YouTube channel live-broadcasting rallies and protests from the streets.

Over 13,000 university students have been boycotting classes for one week since last Monday to protest China's ruling that election candidates must be vetted and approved by a nominating committee in mainland China.