Videos obtained by The Post capture a homicidal maniac bashing in the skull of a homeless sleeping on a Chinatown sidewalk — and first responders later rushing to the scene of the grisly attack and covering the victim in a white sheet.

One disturbing six-second clip — posted to YouTube by the World Journal, the largest Chinese language newspaper in the US — apparently shows 24-year-old vagrant Rodriguez “Randy” Santos bludgeon one of his victims early Saturday morning, striking the man four times with a 3-foot metal pipe.

Detectives were reviewing the video in connection to the attacks on five men, but it was still unclear which of the violent encounters was captured on the shocking surveillance footage posted Sunday.

Police vehicles were later seen arriving to the scene of the early morning rampage and covering the corpse of at least one victim, another clip shows.

First responders appeared to also check on other homeless people sleeping in the area.

At least one black body bag could be seen being loaded into a truck by staffers with the city’s Office of the Chief Medical Examiner.

Santos has been charged in the grisly murders and was expected to appear in court Sunday.

He will face murder and assault charges after cops say he pummeled five homeless men while they slept on the Chinatown streets.

Four of the men died, while the fifth victim, a 49-year-old, was in critical condition with a fractured skull at NewYork-Presbyterian/Weill Cornell Medical Center.