There's also http://gfycat.com http://gfycat.com, which seems fairly popular on reddit. And there's https://vine.co https://vine.co, too, though it's aimed at a

There's also http://gfycat.com http://gfycat.com, which seems fairly popular on reddit. And there's https://vine.co https://vine.co, too, though it's aimed at a different niche. But imgur support would really drive the replacement of GIFs with HTML5 video mainstream, if/when it arrives.