I did a couple of review read online though Nikon does not support out of the box upload for Facebook 360 app, YouTube 360 video, it does support Facebook 360 video. Strangely not the photo but video. For 360 photo, Facebook have a list of compatible 360 cameras listed here.
So how do I get my picture on my Keymission to work on Facebook and video to work in YouTube? For a start you just need to add a parameter in the picture for Facebook to allow the picture to work. Found this article that mention it. Basically to use a EXIFTOOL to add a ProjectionType.
- exiftool -ProjectionType="equirectangular" photo.jpg
For Youtube to work with 360 video, you got to download a metadata tool from YouTube here.
I have tested it on both Facebook and YouTube with picture and video and it works.