Footage captured in the woods on Caerphilly Mountain near Cardiff appears to show Bigfoot right here in the UK.
The clip, filmed by Jason Parsons in July and uploaded onto YouTube, shows a large figure shaking a tree.
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Parsons, 40, said he failed to notice the "ape-like creature" until he watched the video at home.
Speaking to the Daily Star, he said: "I did not notice at the time, but later on, while viewing the footage for editing, I noticed movement in the background.
"To my astonishment, I saw what I can only describe as a gorilla-like figure, slightly blended into the dark bush, but still having a clear form, just like a gorilla or Bigfoot creature might have."
Parsons believes it is the first time the creature has been caught on camera in the UK.
In 2014, two men claimed they had found the Australian Bigfoot in South Queensland.
'Yowie searchers' Jason Heal and Jason Dunn say they offered the mysterious creature apples to lure it onto camera.
They uploaded a video of the 'Yowie' on YouTube and wrote: "We believe it's a young Yowie In the early morning on saturday 29/03/2014.
"You can see the eyes shine as it concentrates on the apples."