I saw this:
In many parts of the video, you can see what looks like a fractal set similar to the Mandelbrot set, changing as the parameters to the underlying complex map are changed. Black, I presume, indicates the points within the set, with bounded orbit, and the colorful region is outside or escaping points, as is usual for this type of plot. But in some cases, you can see that there are areas of color within the fractalized "boundary curve" like a filling, which implies that part of that boundary curve actually lies outside the black set and is in the escaping region. Yet what then does this boundary curve mean, mathematically and dynamically, where it is separating two parts of the escaping region, as opposed to separating the escaping region from the bounded-orbit region? What kind of structure is being seen here?