When previewing VR videos on an iOS device it is possible to pan the video by touching and dragging. A much more immersive way to do this is to move the device around, as if the device's screen were a magic window into a virtual 360 degree space.
By default, iOS has this feature turned off. (Android has this feature on by default). To enable this feature on iOS:
1. Head to the Settings app, and scroll down to Safari. Tap Safari.
2. Scroll down to 'Motion and Orientation Access' and toggle it on
3. Head back to the video on spinxr.com. refresh the page, and you should be able to pan around the video by moving the device.