EDIT:
I just went through the entire thread, saved and named all the files in order.
Filesizes go all the way from 3kb (lol jpg-1) to 900kb (lol 250k unique colors with png.
But overall, we have 60 images with a total of 22mb.
So hmm, maybe let's try slowly going back to the default image, so that we can make a looped video/gif/sb