I have made myself a mini webcam application and the camera that the android is using currently is the back camera. How can I actually change it to the front camera where the screen is facing?
It depends which device you are using. The default device is usually the back camera. Just change the first parameter of the constructor (Unity - Scripting API: WebCamTexture.WebCamTexture). You can list the available devices like this: Unity - Scripting API: WebCamTexture.devices