Steven Barone has scores of videos on his YouTube channel, UFOs in the USA, that he suggests are alien UFOs or top secret US space vehicles hovering over the Nellis Air Force Base in Nevada.
The base, like top-secret Area 51 in the Nevada desert, is alleged by conspiracy theorists to be where the US authorities hide the remains of crashed flying saucers and dead aliens, and where secretive technology is developed and tested.
Some even claim that visiting aliens have been allowed to use the bases to keep them from public view.
But, Mr Barone claims to be on to the secret via his YouTube channel.
He says he may have filmed space craft developed at the air base on numerous occasions.
His latest footage was filmed on February 19 near the base.
He wrote about the video: “If you haven’t heard of the USA space fleet I highly suggest you look up Solar Warden or Gary McKinnon.
“He was the Scottish hacker that penetrated the computers at NASA and the Johnson Space Center.
“He wasn’t trying to do any harm but wanted to know more about UFOs and what the USA knew about them.
“What he found far exceeded anything he was expecting. He found evidence of a secret space fleet that had been in existence since the 1980s.
“It is said that the USA has at least eight tubular motherships and nearly fifty smaller ones.
“What really blew him away was a list of non-terrestrial officers and ship to ship transfers.
“If you believe this then you have to ask where this secret space fleet is based.
“Where better than Area 51 and Nellis Air Force Base.
“This is just a theory of mine and I cannot prove it but based on everything I have seen and filmed over a nearly three-year period it is the only thing that makes sense.”
Asperger’s Syndrome sufferer Mr McKinnon, who avoided extradition to the US over his hacking exploits after a high-profile campaign, reported seeing details of non-terrestrial officers on a database.
Conspiracy theorists claim this must mean a secret fleet of space officers, but sceptics point out it could mean standard airforce or even naval officers.
However, Scott C Waring, editor of ufosightingsdaily.com, believes there are actually aliens based at Nellis Airfocebase.
In response to Mr Barone’s latest video, he blogged: “Here is a great sighting that took place just a few days ago in Las Vegas, Nevada.
“It was over Nellis AFB which has over 1,000 square miles of land… but people never question why they need so much land.
“It’s because the Tall White aliens moved in.
“The USAF let the Tall Whites build their own underground base behind the old firing range.
“An alien race thats lives up to 800 years and is highly arrogant and aggressive.”
But, a UFO debunker claims Mr Barone is mistaken, and is simply filming car headlights descending down a mountain road in the distance on each occasion.
Scott Brando runs hoax-busting website ufoofinterest.otg.
He tweeted: “#UFOs land in #LasVegas #Nevada? No, just headlights by vehicles descending from the mountain roads.”
He told Express.co.uk:”They are not planes. Steven Barone is known to capture headlights by vehicles descending from the mountain roads.
“Every time, every night, he always films the same lights!”
Express.co.uk has contacted Mr Barone through YouTube and awaits a response.