[tsimionescu]

Some animals perceive movement much more quickly than we do, so standard 24 or 30 FPS video appears like a slideshow to them (apparently pigeons fit this category, I have no idea which animals it was tested for).

For binocularity, I'm not as sure, but it may be that with different eye setups, perspective has different rules to appear realistic.

There is also the simple fact that images on a screen don't appear realistic to us either, we just choose to take interest in them because we understand what they are meant to represent.