Here you can see the sequence of The USED phase images. One 16:9 and one 9:16 image was Built per section and merged with the "Cross Fade" Transition.

If you're watching this on a wide screen, you'll notice the Sticky Elements. The width of the desktop screen is used to display content in two columns next to each other. As the name suggests, they remain in their position until they are scrolled out by another image or the next section.