Help yourself to a sizeable pinch of salt before watching this clip, shot in Melbourne, that purports to show secretive graffiti artist Banksy at work.
The video was uploaded to Youtube by a woman called Mia, who wrote: "So I was walking home from work late last night and I was watching a street artist doing a piece in Hosier Lane.
"I double backed and pulled out my phone as he was finishing up. Can't believe I just met Banksy !"
The video shows a hooded figure finishing off a mural in an alley, before the camerawoman pursues him.
The mural was a stencilled (Banksy-ish) image of Pauline Hanson leader of Australia's right wing One Nation party, wearing a t-shirt saying "F*** off - W're fools."
It's apparently 'signed' with Banksy's name, stencilled in a font the artist regularly uses - but many are suspicious that the video is an elaborate publicity stunt.
A Melbourne gallery is currently hosting an exhibition of Banksy's work - and Broadsheet has discovered the identity of the woman who uploaded the video, who describes herself on LinkedIn as a "digital-savvy multimedia professional" in Media Sales and Strategy.
At a glance: Banksy rumours
It is rumoured that Banksy is artist Robin Banks from Bristol and his parents believe he is a painter and decorator
• He is a former public schoolboy...
In 2008, a newspaper claimed Banksy is Robin Gunningham - a former pupil at Bristol Cathedral School
• He is graffiti artist King Robbo...
Suspicions arose when Banksy painted over a Robbo artwork. Graffiti etiquette rules you don't paint over others' work - only your own
• He is Damien Hirst...
They're both from Bristol but do the similarities end there? Some people are convinced that Banksy is a Hirst invention
• He is many people...
He is presumed to be one person, but it has also been rumoured that 'Banksy' is an art collective
• He is a she...
In 2014 a news site speculated that Banksy is a woman as he paints girls and women, unlike most street art