New video of a "TR-3B type of UFO" captured in Russia is being called the "best evidence ever" of a UFO sighting, and has inspired conspiracy theorists around the world. Posted on UFO Today's YouTube page on Saturday, the video shows an object making its way slowly past a building at night, displaying three lights in a triangular formation. "This class of UFOs [are] large, silent, black triangular objects hovering or slowly cruising at low altitudes over cities and highways," the Belgium-based page wrote in its video description. "Sightings usually take place at night." "The object is moving at a very slow pace, too slow to be a classic airplane," the video explains, adding, "The speed at which this object was moving is physically impossible for any airplane build by mankind." While the theorists are claiming the footage is evidence of extraterrestrial life, not everyone is convinced. Speaking to the Daily Mail Online, Nigel Watson, the author of UFO Investigations Manual, says it's