Man's Arc of Horizon And The Southern Star Trails.

From a southern hemisphere perspective, an observer taking stair trail photography direct south, on his north to south meridian will only capture up to 37 percent of the full night's stars, that are mirrored from the central vortex rotation ( the northern hemisphere night sky rotation) within his arc of horizon/his own personal dome, before the stars move out of his horizon , moving westward, before they actually vear southwest then south. Unfortunately people cannot visualize this unless they understand the southern star movements fully, in our flat earth design. People have to realize every man facing south has a cardioid cycle of stars in his arc of horizon, but the loop is behind (south) of his night time perspective of his seen stars. At the same time as the northern vortex spiral of stars turns, the southern mirrored images move west. One has to appreciate the spiral within the vortex to conceptualize the mirrored effect. Then of course there is the parabolic mirror to understand too.
The point to be had in this video, is that the southern stars not only appear to revolve around Sigma Octantis , but they also move west, while the northern stars do not ! It is a fixed central rotation, unless you start filming east or west of your meridian, but that only warps the rotation. This happens in the south too but it is a separate operation to the stars that can easily be tracked west, with star trackers for verification.