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.
It’s a great format—they do make websites load noticeably faster (especially with a lot of images), however it’s extra work dealing with compatibility and it does make it harder for users as they aren’t compatible with some of software/operating systems yet
I’ve never encountered a program that wasn’t compatible with WebP, what are you using?
I have since tailored my app choice for webp so unsure nowadays, but my experience was that Windows photos could not open them, Photoshop requires a plugin, websites don’t allow uploading them, the list went on. I love webp but the application support has been (or was) abysmal for years.