The bizarre footage was taken last week above San Antonio and appears to show a triangular object hovering in the skies.
“That’s a f***ing UFO,” the person behind the camera gasps in the clip.
“What the f*** is that? It’s hovering in the sky and one of the lights just went out.”
The formation of lights barely moves throughout the original 30-second clip.
Tyler Glockner, of YouTube channel secureteam10, re-posted the video yesterday.
He said: “Triangular formation of lights are very common, with many people believing they are craft from out of this world or sightings of the infamous TR-3B, or black manta.”
The TR-3B is the name of a surveillance plane of the United States Air Force, speculated to have been developed under a black project.
Its existence has never been officially recognised but believers claim it is a supersonic stealth spy plane with a triangular design.
Believers in the programme say it was used during the Gulf War to provide laser designation for Lockheed F-117 Nighthawk bombers.
“The Black Manta is said to use anti-gravity technology that is, in turn, reverse-engineered from alien technology,” Tyler added.
More than 200,000 people have seen the clip, with many agreeing that it could be the infamous spy plane.
“That’s a TR-3B or alien craft,” one wrote.
Another added: “The three lights look like the government’s silent TR-3B some of them also have the red pulsating light in the centre.”
And a third said: “Those lights are not freaking helicopters.”
It is not the first time claims the TR-3B has been supposedly caught on camera.
There were claims the spy plane had again been filmed over Texas last September.