4K video from the International Space Station.
Try full screen with a 4K monitor.
Wagga, maybe for you it looks ok, ...but there's a problem for us up here on the topside -- it's upside down!!
I had to turn my monitor upside down to watch it. (Actually, on Windows, Ctrl-Alt-DownArrow inverts the view. I felt much better watching it that way. And C-A-UpArrow returns back to normal.)