Try downloading a video from a popular social network. Can you easily do it without inspecting the source? If it's a two second clip, does it loop on your system? Or does the video player exit / end the stream?
This is absolutely a problem that GIF doesn't have.
> You don't need a proprietary player to loop a video
> You can save any video file just like a gif.
Except social networks force you to use a locked down or DRM'd player. You can get chunks of the video sometimes. Your non-tech friends are out of luck.
> you just go back to the start of the video
"just". Yeah, how many players support that out of the box? Yours might, but there are many more that do not.