The passenger, who is from Kolkata, told PTI about the incident on condition of anonymity. He said that he was worried about his mother who was sitting near the seat where the incident happened.
According to the passenger, the reason for the scuffle was not clear.
Later, other passengers and airhostess pacified the individuals involved in the scuffle, he added.
It could not be immediately ascertained whether the incident was reported to the authorities in Kolkata after landing.
In the clip, two passengers were seen arguing before one of them first said 'haath neeche kar' (put down your hands) and then started slapping the other person. A few other passengers were also involved in the scuffle.
Thai Smile Airways could not be immediately contacted for comments.
Last week, a video clip of a heated exchange between a passenger and an airhostess onboard an IndiGo flight from Istanbul to Delhi was shared on social media.
The heated exchange over choice of meals onboard the flight happened on December 16.
IndiGo and DGCA, last week, said they were looking into the incident.