Front Camera Issue

What happens is that whenever I use the front camera, It shows normal result, I take a picture and it's cool but whenever I start recording, the screen goes dark, dull as if there's no light in the room. Same with every other application I use like snapchat. This really sucks and I hope there's a solution to fix this.
I faced the same issue with my old S2 but I thought it might be some kind of hardware issue but it actually wasn't.