How does Facebook make their 360-degree videos?
doesn’t offer you any sort of feature through which you can create a 360-degree video as Facebook offers you the feature of
live 360-degree video
which lets you interact with your fans, audience, friends etc. in a 360-degree angle.
However, if you want to upload a 360-degree video on Facebook you need to create those videos using 360-degree mode compatible cameras which lets you record video in 360-degree modes.
For uploading a video which is recorded in a 360-degree mode you can follow similar steps to upload just like you upload any other video on the Facebook timeline. If the video isn’t recorded with any sort of spherical camera and it doesn’t add 360-degree metadata then in that case you need to add 360 metadata to the specific video and then follow the similar steps to upload the video.