A new North Korean propaganda video has emerged, depicting US President Barack Obama and American soldiers through a background of flames. The footage states Pyongyang carried out its latest nuclear test to spite the US, which warned against it.

The video ends with a simulation of a nuclear explosion underground. It was initially posted on YouTube account connected to a government news and propaganda agency called Uriminzokkiri, AFP reported.

The footage came with Korean captions, pointing out that the test had been conducted because of the US hostility.

"The North's high-level nuclear test aimed at US invaders is a nuclear deterrent to safeguard our sovereignty," one caption read.

"The US practically guided the North towards conducting the nuclear test," it added.

The footage emerged as North Korean scientists, technicians, workers and officials who were behind the test were honored in the capital during a day of the official celebration of the successful launch.

A fortnight earlier, Pyongyang posted other footage which showed New York on fire following what appeared to be a missile attack. The video was deleted within a few hours.

North Korea has threatened the South with 'final destruction' during a debate at the UN Conference on Disarmament on Tuesday, Reuters reported. It follows an underground nuclear test just over a week ago, which triggered immediate condemnation from the UN and the international community.

Pyongyang reportedly responded by informing its primary ally China that it may stage two more nuclear tests before the end of this year.