It would be fun to see a set of frames rendered out and stitched together to make an animated sequence. 17 hours per frame. It'll be like Pixar where you'd need a render farm of Speccy's to knock it out.
Also, not exactly the same type or rendering, but basically word for word what you wrote: the full-screen fully animated parts appear to be "a set of frames rendered out and stitched together to make an animated sequence"
Here is a page with some info and a video of the animation: http://www.randelshofer.ch/animations/anims/eric_graham/Jugg...
I generated a couple of dozen frames of a Julia set distorting, in monochrome, saved them to the RAMdisk... which took a couple of hours or something... and then loaded them back in sequence from the RAMdisk, which gave me a few frames-per-second "video".
It worked and it fit into 20kB or less of code, and about 90kB of RAMdisk.