Twelve boys and their coach, Ekkapol Chantawong, from the "Wild Boars" soccer team speak during a press conference for the first time since they were rescued from a cave in northern Thailand last week, on July 18, 2018 in Chiang Rai, Thailand.
But doctors said all 13 were in good physical and mental health after recuperating in hospital.
The boys, who sported crisp haircuts, had gained an average of 3kg each since the rescue, and rain through confidence-building exercises ahead of Wednesday's event, the hospital director said.
Saman died on July 6 after losing consciousness during a mission to place oxygen tanks deep inside the cave, just two days before the first boys were brought to safety.
"Bringing the Wild Boars Home", read a banner in Thai welcoming them on the set, created to resemble a soccer pitch, complete with goalposts and nets.
The documentary looks at how the boys entered the cave near the Myanmar border and became trapped, how they managed to survive without food or knowing how to swim, as well as the scientific and technical innovations that were used in their rescue.
The children and their coach got stuck inside the 10km-long Tham Luang cave complex in the north of the country on June 23, after floods caused by heavy rainfall blocked the entrance. However, since Adul was busy conversing with the divers he could not translate so one of the boys told the coach to be patient. "I can finally sleep well last night", he said.
All said they want to apologize to their parents, most of whom they had not informed in advance about the trek to the cave after soccer practice. But a rainy season downpour flooded the tunnels, trapping them.
Upon hearing about the death of a volunteer rescue diver and former Thai navy SEAL taking part in the mission, everyone was in shock, they said.
"We want to reduce public curiosity", the government spokesman Sansern Kaewkamnerd told Reuters on Tuesday.
Foreign divers and Thai Navy SEALs spent three days bringing the boys out by diving and carrying them through the waterlogged corridors of Tham Luang. I said "hello" or something like that.
Everyone was very sad.
The coach and the 12 boys were speaking in public for the first time since being extracted from the cave in a three-day operation that captured the world's attention.
When Titan, the youngest of the 12, said he tried not to think of food because it only made him hungry, the others laughed out loud - proof again that even in the worst conditions, these boys have an unbeatable team spirit.