By Phuket Gazette
The 28-second clip was posted on Friday and shows a man and a woman moving suggestively in the tuk-tuk with the woman’s shirt lifted to expose her torso.
Karon Police investigated and found the tuk-tuk driver who said he was hired to deliver the tourists to a hotel in Wichit.
The driver said the two tourists were not having sex, but simply "rocking their bodies to the music" he was playing.
Tourist police located the couple yesterday and fined them for conducting an indecent act in public, said Phuket Tourist Police Chief Naruewat Puthawiro.
Lt Gen Naruewat said the man is 33 years old and the woman, 21. They both denied the charges and insisted on the same statement as the tuk-tuk driver.
Officials declined to name the couple.