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.
Edit: honestly I assumed it had something to do with Google protecting themselves from image piracy shit
Neither have they the choice of what format others use. The point here was that the apps are to blame for not supporting the format, not the format for not being supported. It’s a common format nowadays.