Video thumbnails icons create an eye illusion
i'm a bit picky here, but that's a problem we also pay attention on car infotainments trying to create clear screens, that is important because we dont want the driver losing the attention on road looking the screen more than he should
to describe the issue, on Shell overview when Nautilus window gets smaller, when there are lots of video thumbnails, they create an eye illusion (like motion blur), both because of the color, and the pattern (with the small video stripes holes), that personally makes me "dizzy" at staring on them
it is not huge deal, because i can only notice that on overview mode (and i realize it depends on screen resolution, screen size, and user position), but i think the thumbnails should get improved by removing the details (specially the 18 small holes per icon!!), and perhaps by using less "abstract" coloring