Introducing 360 Video on Facebook – About Facebook

To create 360 videos, a special set of cameras is used to record all 360 degrees of a scene simultaneously. This means that when the video is playing on Facebook, you can choose what angle you want to see it from. On the web you can do this by dragging around the video with your cursor, and on mobile devices you do it by dragging with your finger — or even just by turning your device.

https://about.fb.com/news/2015/09/introducing-360-video-on-facebook/