The video, captured in Middlesbrough on April 5, shows a number of unidentified flying objects in the sky.
Four of them appear to be small, round-shaped, but the leading jet seems much larger in size.
According to a witness, only the plane at the front could be heard.
THE HIDDEN UNDERBELLY 2.0
“There was only the sound of the plane as it passed by”
The anonymous source revealed: “While walking home from a friends house around 7pm, I noticed some dark objects in the sky.
“At first, I thought it was a flock of birds, but soon noticed that it looked like some sort of military plane flying in a slightly curved path followed by four small, round objects.
“I watched them for around one and a half minutes before losing sight of them in the distance.
“There was only the sound of the plane as it passed by.”
There is an ongoing conspiracy that governments around the world, including the US and UK, use secret, highly classified bases to test reverse-engineered extraterrestrial technology.
One of these is rumoured to be a silent aircraft known as the Black Triangle.
Many American’s believed this photo to prove the existence of UFO
The clip was shared on popular YouTube conspiracy channel The Hidden Underbelly 2.0 yesterday with the title: “Jet caught being escorted by four UFOs.”
And viewers were left speculating what it could be.
One comment read: “Hmm, definitely a bit odd.”
And another simply added: “Aliens.”
But a third had a more reasonable explanation, stating it could be some kind of refuelling operation.
It is not the first claim to surface regarding secret black projects, though.
Only last week a huge triangle-shaped aircraft spotted in Los Angeles sparked online frenzy.
And before that, conspiracists believed they had captured a cloaked US spy plane tracking the ISS station.