Just like with the old Oculus headsets you could see on the computer screen what the VR players see, the arena allowed us to experience what the players saw projected to a giant wall. The arena was equipped with a device in the corner which kept an eye on the player, and there were projectors on the top as well. There was a ring light showing where the player was supposed to stand. Very cool setup!

On mobile devices click on the cardboard icon to use a VR headset to look around
Look around with directional swipe gestures on touch screens, or use the top-left Google Street View like controls of the YouTube video. Use cardboard or VR headsets if available for more immersive experience.