Summary
Childish Gambino keeps on singing and dancing through the video, even he shoots people twice. The background looks so chaotic. At the end, he runs like trying to escape from something.
Symbols
The white clothes of the man who got shot - innocence
Children taking videos with their smart phone - onlooker (傍観者)
Fire and smoke - terrorism
Singing, dancing - amusement, luxury
Irony
The gun is treated better than the black man's body.
People don't care about what is happening, they keep on dancing or take videos instead.
The people in church were shot (It is suppose to be a place were everyone can be safe and blessed).
Theme
Prejudice and discrimination toward black people still exist in America. There are problems everywhere, like gun crimes and terrorism. I think this video shows that the biggest problems is how people act like they don't care about those issues. People are escaping from the reality by just looking and focusing on the fun things around them, but that may result in facing problems themselves (like Childish Gambino was chased by something at the end of the video)