I don’t know what a .webp file is but I don’t like it. They’re like a filthy prank version of the image/gif you’re looking for. They make you jump through all these hoops to find the original versions of the files that you can actually do anything with.
WebM can create loops
Even .apng could but was rarely if ever done for some reason.
I haven’t even heard of .apng, is it widely supported?