I'm not sure how I feel about cohost allowing animated webps. I don't know how hard it is to allow static but not animated, especially since the site's thumbnailing uses webp, but I feel like the ability to use webp maliciously is just as high as mp4 if not more.
I think I'm mostly just irritated because it's a lot harder to export to for most people and the compression, based on my limited messing with it, suuuuuuuucks. Also the encoder in ffmpeg doesn't use threads at all.
I don't know if this is intentional allowing of it, but at least right now they're allowed to be posted. Watch this be fixed very soon.