Summary
It is a music video by Childish Gambino (Donald Glover) and the video was describing what was happening in the United States. In the video, he shoots twice and at the end, he seems to run away from something.
Symbol
dancing is the symbol of the African people's culture.
half naked is the symbol of the period when African people were used as salves.
white factory is the symbol of white people (=Ameircans)
fire is the symbol of the danger, war, and death.
gun is the symbol of America allowing to have the gun
Irony
At first, people are dancing and singing freely and enjoying themselves, but there aren't any doors to get out (= there aren't any free for African people)
Theme and opinion
I think this video is showing the problem about United States' gun problem. Since America permits to have a gun to protect theirselves, guns could turn into an awful, dangerous thing. I think this theme is not to hide the incidents that happend in the United States and should deal with it.