WebM Video and Photo/Photo Frame examples
Video example. The WebP (1,65 Kb) copy made from MP4 (2,56 MB) is here about 0,64% smaller than its original.
Photo example. The WebP (147 Kb) copy made from JPG (201 Kb) is here about 0,75% smaller than its original.
Photo Frame example. The WebP (0,277 MB) copy made from GIF (2,44 MB) is here about 8 times smaller than its original.