Did mine a bit differently than what was shown in the video, but similar. Instead of deleting the face of the ramp, I went ahead and extruded out the vertices at the top of the ramp, extruded the created edge to make the face, and then extruded that face to the tip of the pyramid to make the top railing. After that, I just extruded the outer face of those to the bottom of the ramp to complete the railing.
