I don't see why we can't use the IMG tag for video and the VIDEO tag for images. They should be unified, with all the same media formats supported.

IMG would autoplay, would not have sound, would loop, and would not have controls.

VIDEO would be the opposite. For something like a plain JPG or PNG file, it just shows the one frame. Animated GIF files would of course benefit from the controls.

The same should go for unification of the VIDEO and AUDIO tags. Play an audio file as video, and you get a black screen with sound. Play a video file as audio, and you just hear the sound.