'This video will make you angry' and creators say that's why you will share it like a germ

LONDON, England --  The folks behind CGP Grey make videos that explain things.  But this time they have really outdone themselves.

They have created a video explaining how viral videos go viral using a video that is itself going viral.

In the process they also do a darn good job of explaining why the internet has lead to our currently polarized political environment.

The video compares ideas and how we share thoughts online and on social media with germs and how they spread.

"It's your brain," says the narrator at one point in the video.  "Be hygienic with it."