Thai health authorities on Saturday released new video footage of 12 boys and their soccer coach now recovering in hospital following their dramatic rescue from a flooded cave in the country's north.

In the video, the second to be released since being placed in an isolation ward, the boys expressed their thanks to the navy SEAL team in charge of the rescue operation and expressed gratitude for the outpouring of support from people in Thailand and abroad.

The video consists of short clips of all the boys and their coach speaking one after another about how well they are recuperating.

According to the health authorities, as none of them are suffering from infectious diseases and their physical condition is good, the doctors are making preparations to discharge them. Local media reported that they will be let out from the hospital as early as Thursday next week.

The doctors have reportedly advised the boys to spend at least a month with family and friends to restore their mental health.

The boys and their families have also been advised to avoid contact with the media over fears that being interviewed may trigger a posttraumatic stress disorder.

The Wild Boar soccer team members entered the Tham Luang Nang Non cave in Chiang Rai province on June 23 and were subsequently trapped by rising flood waters. Amid a frantic search by hundreds of rescuers and support personnel, they were found about 4 kilometers inside on July 2.

All 13 were successfully extracted from the cave over three days from Sunday in a daring rescue mission.