In a communist country like North Korea, nothing is impossible, as was in China before the bamboo curtain was raised and Chian opened up to the world. The state can simply launch the propaganda machine and convey whatever messages it desires. Even if the information delivered to the general public is truth, it always contain partisan bias and fail to present a complete and balanced consideration of the issue, let alone those exaggerated idle boasts.
Below are some other North Korean political propaganda video clips. I wonder what were on the minds of the artists who performed at the stage and the producer who edited the video clips when they were carrying out those 'missions' assigned by the state.