What is it?
The 2017 arms-control advocacy short film Slaughterbots.
What is it about?
This is how the Wikipedia describes this short film:
Slaughterbots is a 2017 arms-control advocacy video presenting a dramatized near-future scenario where swarms of inexpensive microdrones use artificial intelligence and facial recognition to assassinate political opponents based on preprogrammed criteria.
The video was released onto YouTube by the Future of Life Institute and Stuart Russell, a professor of computer science at Berkeley, on 12 November 2017.
The video quickly went viral, gaining over two million views.
The video was also screened to the November 2017 United Nations Convention on Certain Conventional Weapons meeting in Geneva.
I think that this short film is better than episode 6 (Hated In The Nation) of Black Mirror (Season 3), and it seems realistic enough and like something that will probably be possible in the future if we are not careful.