The video is purposely made for North Korea night satellite image. But it included the rest of the world as comparison, so you can see China and compare it to the rest of the world.
This is the No NASA Photoshoped version. It's bright and dark as it supposed to be. No developed vs developing adjustment, as well as democracy vs non-democracy.
Light everywhere around the world are just same. No excuses and self-blaming like because in China, people tend to turned off their light when sleeping. No insurance company policy required them to be turned on.
The only different that affected the light of night satellite image is open land vs forest-mountainous area, where open area tend to be brighter.