Fully immersive VR is when the user fully steps inside a virtual synthetic world. This world is an artificial environment built for simulations, gaming, training, virtual exhibition experiences or for entertainment purposes. Normally the user would have a headset plugged into a high powered PC to run the virtual reality.
The headset allows the user to see and listen to the visual and sound aspect of the video, and controllers can allow the user to touch and pick up elements if included. Another key functionality is the ability to move around the area of the video, to get closer to different parts of the area. The user can also click on hotspots to load more information such as text, photos and videos.