For a while I thought FPV refered to what you see through the camera on your device. I was having camera issues at one time and someone suggested to make sure my FPV switch was in off position. It was and that camera is a whole separate issue, it was just the first time I noticed a FPV switch in the app. What does this do for me that my camera is not already doing? Is this for use with goggles or other devices?