APNG should work on every social network, forum or whatever community site that allows PNG, because the file ending is also “.png”. If you want to create APNGs, you can for example use some of the following tools:
I admit: this is the crucial point right now. APNG creation is not that comfy as it is with GIF or Gfycat/GIFV. But for a start take a look around the web for already existing APNGs. Some sites provide APNG collections. Check out /apng on reddit or the apng tag on tumblr. And there are GIF artists experimenting with the format, for example davidope.