White House brushes off North Korea 'propaganda' video

Carney said that while he had not personally seen the video, he had read media accounts depicting its contents.

"We are working with our allies to isolate and pressure North Korea appropriately, given its continuing defiance of its international obligations," Carney said.

The video, first reported by NK News, brags about North Korea's latest successful nuclear test and includes computer-generated simulations of the test.

"North Korea’s third underground nuclear test! Let it be known once more that this is strictly our practical counter-measure for North’s safety and to protect its sovereignty from the aggressors. It is also a solemn warning that time is no longer on the side of the United States," the video says in a translation provided by NK News.

President Obama is expected to discuss North Korea's nuclear test and the possibility of additional sanctions with Japanese Prime Minister Shinzo Abe when the leaders meet Friday at the White House.