As the commentators point out, the important things aren't the things the video is showing, but rather the things it is leaving out or censoring — such as price

As the commentators point out, the important things aren't the things the video is showing, but rather the things it is leaving out or censoring — such as prices at the supermarket, or what (presumably foreign) brand shoes people wear, or what life is like outside the center of the capital. That's why propaganda can be so effective. Your average person is not going to watch these with a critical eye, and their takeaway will be that life in NK is just like life elsewhere.