SEOUL, South Korea — Soon after the ferry began to tilt, there was nervous laughter, jokes about the Titanic and talk of selfies and Facebook posts from the doomed high school students huddled below deck.

But the lighthearted atmosphere soon turned serious as the listing worsened. Fear began building, and one student asked, “Am I really going to die?”

The shaky video – at times poignant and heartbreaking as the teens said last words to their loved ones – was found on the cellphone belonging to 17-year-old Park Su-hyeon when his body was recovered after the disaster on the morning of April 16 off South Korea.

The boy’s father, Park Jong-dae, provided it Thursday to The Associated Press, saying he wanted to show the world the conditions aboard the Sewol as it sank. He earlier released it to select South Korean media. Information such as video can be recovered from micro SD cards in cellphones even if the device is submerged.

More than 300 people are dead or missing in the disaster, which has plunged South Korea into mourning and touched off anger and shame. About 220 bodies, mostly from inside the submerged vessel, have been recovered. More than 80 percent of the victims were students from a high school in Ansan, south of Seoul, on their way to the tourist island of Jeju for a school trip.

The group of teens in Park Su-hyeon’s video alternated between bluster, attempts at humor and unmistakable fear.

Only one could be seen wearing a life jacket at the beginning of the clips, which started at 8:52 a.m. and ended, with a small break between them, at 9:09 a.m., when everyone appeared to be wearing them.

Some of the students struggled as they tried to buckle the life jackets. As the listing worsened, they joked about “final commemorative pictures” and “defying gravity” by trying to walk on the walls.

“It’s like we’re becoming the Titanic,” one student said.

At 8:53 a.m., less than two minutes into the video and two minutes before a crew member on the bridge made the ferry’s first distress call, one student said: “Am I really going to die?”

At the start of the video, a message blared from the ferry’s loudspeakers: “Don’t move away from your places and brace for any possible accidents.”

In subsequent announcements, passengers were again told to stay put, even as some questioned whether they should flee.

The last message from the bridge came at 9:08: “We’re again announcing: For passengers who can wear life vests, please wear them now. Never move away from your places.”

That warning came eight minutes after a Sewol crew member told a marine traffic official, “The body of the ship has tilted, and it’s impossible to move,” according to a transcript of communications with the ferry.

After the passengers were ordered to stay in their cabins, Capt. Lee Joon-seok took at least a half-hour to order an evacuation. It is unclear whether that order was ever relayed to passengers. Lee has said he delayed the evacuation because of worries about sending passengers into cold waters and fast currents before rescuers arrived.