Damning footage not seen outside a courtroom puts alleged killer and conspirator Zubayar Al-Bakoush at the scene of the crime at the US embassy compound in Benghazi, Libya the day militants attacked the facility and killed four Americans.

The footage, used as evidence in a related trial and obtained by The Post after Bakoush was brought to the US to face charges, shows him dressed in camouflage, standing outside the gate of the compound on Sept. 11, 2012 as a group of about 20 armed men breach the gate of the US Mission in Benghazi.

The feds charged him with murder and terror charges in an indictment unsealed Friday after extraditing him and bringing him to the US.

The newly unsealed indictment states that Bakoush, 58, and about 20 armed men violently breached the main gate of the US Mission at Benghazi, and that Bakoush entered the facility, conducted surveillance, and tried to get into staff vehicles.

Conspirators had AK-47 rifles and rocket-propelled grenades. US Ambassador Chris Stevens, US security contractors Tyrone Woods, Glen Doherty, and IT officer Sean Smith were killed in the attacks.

The Post obtained the video after Bakoush arrived at a Virginia airfield early Friday following a “transfer of custody.”

He didn’t enter a plea during a hearing later in the day.

Related Benghazi cases reveal what evidence the feds already have on him: video images of him armed in fatigues, banging on a car that got torched, and standing outside the base at the start of the attack.

“He played a prominent role on the ground. His name came up quite a bit in the trial,” said attorney Matthew Peed, who represented Moustafa al-Imam, who was convicted on Benghazi conspiracy charges in 2019.

“The government’s witness at trial had known Bakoush since he was a teenager when they were in Scouts together,” he noted.