Nathy Odinson, 33, from Cambridgeshire, is said to have jumped from a 29-storey skyscraper on Saturday night.
The stunt, which was being filmed for social media, took a horrifying turn when Mr Odinson's parachute failed and he plunged to his death.
Footage appeared to capture the moments before Mr Odinson fell.
In the clip captured by a companion, Mr Odinson was seen standing at the edge of a rooftop in front of the night sky, wearing a helmet fitted with a camera, and carrying out checks on his equipment.
The clip then captures him counting down before jumping off the roof, saying: "Three, two, one...see ya".
Mr Odinson reportedly hit a tree before falling to the ground.
Photos showed emergency services at the scene on the street below, and what appeared to be a blue parachute on the pavement.
The incident happened around 7.30pm local time on Saturday, according to local media reports.
According to the Mirror, police lieutenant Kamolporn Nadee, Deputy Inspector of Investigations at the Bang Lamung district police station, said: "The parachute that the deceased used to jump malfunctioned and was not centred as expected.""Forensics officers are investigating the case further. They are examining the parachute," the police officer added.
Police have reportedly informed the British Embassy in Bangkok.Mr Odinson is understood to have been an experienced skydiver, who carried out jumps around the world in countries including England, France, Switzerland, Portugal, South Africa and Thailand.
He ran Instagram and Facebook pages under the name Nathy's Sky Photography, which documented his jumps both solo and with private skydiving clients.