When the guy in the video has such a a slow and annoying voice, you may as well just post an article. Nobody here watches videos, especially not such long ones.
Well, I've guess you've got your Brexit now, so you can take the picasso out of the continentals who are committing national suicide. I would laugh too.
Demographics are incredibly, incredibly important. That graph hints a lot at what the future world will look like, and Europe and Africa's places in the world.
Just one example: the migrant crisis of 2015-16 caused a collosal shift in politics. That graph predicts similar crises, but on a far larger scale. The fallout will be cataclysmic.