Viewers of the video, which is being shared on UFO websites, claim it could be a mysterious TR-3B, which is an alleged secret spy craft developed using alien technology.
The TR-3B is alleged by conspiracy theorists to be a secret “black project” spy craft of the US Government that can be flown into space.
The allegations are that these crafts are created at top-secret military bases like Area 51 in Nevada, by reverse engineering alien technology.
Others claim they are actual UFOs flown by aliens visiting Earth.
Various pictures and videos have flooded the web in recent years claiming to have captured the top-secret craft.
The latest clip of a strange object in the night has been branded “the best evidence ever of a TR-3B, after allegedly being filmed in the sky over an undisclosed part of Russia.
In a video entitled “A TR-3B type UFO was filmed in Russia – Best evidence ever”, which has been shared by Belgian YouTube channel UFO Today, three lights are seen moving extremely slowly across the camera’s view.
They appear to change from red to yellow throughout.
Tim Beckers, who runs UFO Today, claimed the “slow speed of the craft” means it could not have been made with any known technology used for standard air craft.
However, it has no emerged they may be nothing more than standard military flares.
Mr Beckers had said: “This footage was making headlines in underground UFO groups after it was posted on the dark web.
“The object is moving at a very slow pace, too slow to be classic airplane.
“The speed at which this object was moving is physically impossible for any airplane build by mankind.
“Reports generally describe this class of UFOs as large, silent, black triangular objects hovering or slowly cruising at low altitudes over cities and highways.
“Sightings usually take place at night.
“These objects are often described as having pulsing coloured lights that appear at each corner of the triangle.”
More than 23,000 people saw the footage, with many offering their views.
One viewer posted on YouTube: “And people say they aren’t real.”
Others were not convinced it showed a TR-3B, with some adding it could just be a drone.
Another investigator said it was just military flares and the sighting had previously been debunked.
One poster added: “TR-3B’s have a light in the middle. This one did not.”
A third wrote: “Suspiciously poor quality.”
British UFO investigator Nigel Watson, author of the UFO Investigations Manual, said: “At night it is hard to gauge the distance and size of an object or lights, which in turn makes it difficult to judge their speed.
“As this seems to be flying slower than an aircraft I’d say it is a drone with lights on it.
“Drones can hover and move slowly, with little noise.
“So I don’t regard this video as evidence for ETs visiting us.”
Italian Scott Brando runs the debunking website ufoofinterest.org.
He looked at the case, and said the footage had previously surface and had been explained away at the time.
He told Express.co.uk: “It was a launch of cluster flares during military exercises over Russia.
“This is an old explained case being re-shared.”