Among millions of other goodies, https://publicdomainreview.org also has a collection of animated gifs like this one:

That site is a project of the Open Knowledge Foundation. They trawl through collections of images, books, films, audio, essays and pick stuff that is obscure (i.e. well-hidden), amazing, insane even. But always interesting and not easily found elsewhere. And everything they publish is under a Creative Commons Attribution-Share Alike license. In other words: they charge no money so they make no money. I’ve put my money where my mouth is and donated. You should do likewise, or else an amazing resource like this one cannot exist.