This video shows the scatterplot of the trivariate data from Exhibit 1.1, rotating the scatterplot around the vertical dimension ("Purchasing power"). The rotation pauses at the viewpoint shown in the upper figure of Exhibit 1.3, where the points line up approximately along an axis, as shown in that figure (this type of dispersion axis is called a "principal axis"). This means that the points must lie approximately in a plane and this viewpoint is looking at that plane from the side. This viewpoint is the start of the animation sequence in the next video.
Here the three-dimension scatterplot is rotated around the principal axis detected in Video 1.1, until we reach a point which is perpendicular to the plane in which the points lie. The rotation pauses at this viewpoint, looking down onto the points spread out in the plane, before returning to the original view from the side. At the moment when the rotation pauses we are getting an excellent two-dimensional view of the countries, with only a little loss of information in the form of the small deviations of the countries from the plane.