There is no path to $100B.
Even though this is Y Combinator, no one reading this article will ever build a $100B company (except if we get massive hyperinflation of the USD). In fact, massive hyperinflation of the USD is a much more likely path for you to build a $100B company rather than the path suggested by this video.
It's much more likely that the world will end before you (who is reading this) will build a $100B company. That's how bad the odds are and how pointless this video is.