I take the LG 360 cam and the Gear 360 and put both images side by side. If you are watching on the YouTube app on a smart phone, you can rotate the phone, or use your finger to see the full sphere.
If you are on a computer than you can just use your mouse to drag along the video and look around. You must be using a chrome browser for it to work correctly!
Make sure your video quality is turned all the way up so you can see everything!