This is a cool video/GIF/moving image of a satellite transiting the moon as seen from the Royal observatory.
I don't understand exactly what I'm looking at from a web point of view - if I try to right-click and save I get 750kB of HTML.
How can I display/embed this cool moving image in a Question in space SE? Is there a way to extract a GIF?
Manual screenshot, showing the speeding satellite as a little blurred white thing, and the letters GIF in the bottom left corner. It turns out (pointed out by @kimholder below) that it's a Faux-GIF!