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.
Because you’re implying that it’s 50x more efficient than jpeg, it’s not. For similar visual quality of images webp will on average produce a ~30% smaller file.