Load the GIF (… bytes)
Animated GIF pan.gif· … bytes · 256 colors per frame, no way to pause it
Animated WebP pan.webp· … bytes · an image, so still no pauseVideo pan.webm(AV1) · … bytespan.mp4(H.264) · … bytes
Playing:
Thirty frames of a slow pan, 400 × 226 pixels. Same frames, very different costs. If your system asks for reduced motion, the GIF and WebP show a still photograph and the video waits for you to press play.
pan.gif · … bytes · 256 colors per frame, no way to pause it
pan.webp · … bytes · an image, so still no pausepan.webm (AV1) · … bytespan.mp4 (H.264) · … bytes