A typical single image webp file displays a normal thumbnail. However, the thumbnail display is not suitable for the animated webp file. The gif file is a moving file, but the first frame is displayed as a thumbnail.
When accessing the animation webp, the thumbnail is not displayed because of the error " PHP Fatal error: gd-webp cannot allocate temporary buffer in /var/www/html/lib/private/legacy/OC_Image.php on line 722 . "