Immersive content is best viewed with a VR headset and headphones. With your mobile phone you can use an inexpensive viewer like the Google Cardboard or one of the other great options for mobile viewing with the YouTube app which supports 360˚ video natively on most platforms. There is also the more advanced Gear VR for some Samsung mobile phones.
360˚ Video is supported on some desktop and mobile browsers including:
You can also view 360˚ immersive content via: