"The public at home and overseas. are feeling regretful, blaming the USA for the summit that ended without an agreement", an editorial published by KCNA wrote.
The footage's release on Wednesday night came amid reports that North Korea is restoring some facilities at its long-range rocket launch site that it dismantled past year as part of disarmament steps.
Provocative activity from North Korea this week has not altered President Donald Trump's willingness to engage with the regime of Kim Jong Un, a top White House official said Thursday.
The latest summit clearly showed that Kim's denuclearization pledge was a lie.
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A historic first meeting between Mr Trump and Mr Kim in 2018 in Singapore produced a vaguely worded agreement on "denuclearisation" but little progress.
The BBC's Seoul correspondent Laura Bicker says that North Korea might be testing the U.S. after talks in Hanoi between Donald Trump and Kim Jong-un broke down, hoping that the United States will offer a better deal to avoid a launch.
North Korean documentaries are typically propaganda venerating Kim, the subject of a strong personality cult among the North's 25 million people.
The images, which were released to the US's National Public Radio, also showed activity at North Korea's Sohae site which has been the scene of satellite launches in recent years.
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"We have sufficient time", the official said, without mentioning a deadline for reaching an agreement so the goal could be met. The statement was much milder than its past warlike statements issued in response to the just-ended South Korea-US drills that North Korea viewed as an invasion rehearsal.
United States officials say the main goal for now is to make sure the North Koreans do not resume testing in any way, including of space launch vehicles.
Experts at California's Middlebury Institute of International Studies say that satellite images of the Sanumdong rocket factory taken on February 22 and on Friday suggested North Korea could be preparing to launch a missile or a space rocket. Biegun, the US envoy to North Korea, gave members of the Senate Foreign Relations Committee a classified update Tuesday afternoon on Capitol Hill.
"He said there is no evidence that North Korea's work at the site signals Kim is preparing to test another intercontinental missile". The U.S. Geological Survey measured the North's sixth and most powerful nuclear test in September 2017 at magnitude 6.3.
A staunch backer of Korean reconciliation, Kim was a North Korea studies professor and adviser to a previous administration in which Moon also served. "We also don't know how far the train has gotten".
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