The Guardian was unable to immediately confirm the man as Kim Jong-nams son, Kim Han-sol, who is believed to be 22. However, an official at the South Korean national intelligence services public affairs office and an aide to a parliamentary intelligence committee said they had determined it was authentic.
Kim Jong-nam was attacked by two women in Kuala Lumpur airport on 13 February and an autopsy revealed he died of poising from the nerve agent VX, a banned chemical weapon known to be produced in North Korean state laboratories.
Kim Jong-nam was once the North Korean heir apparent but went into exile in 2001 after falling out of favour with his father, Kim Jong-il. After his half-brother took power in 2014, he became extremely paranoid about his safety, a close friend said.
The video was uploaded to the YouTube page of a previously unknown group, Cheollima Civil Defense, which claimed to have extracted vulnerable members of Kim Jong-nams family with the help of the Dutch, US and South Korean authorities.
It said it was keeping them under protection in an undisclosed location.
