If you want to make sure that your webcam is off in X-Lite, you can change your settings in X-Lite for that.
Click on "Softphone" on the top left corner then select "Preferences"
In the window that pops up, click on "Devices" on the left
Now, on the bottom area, click on the Other Devices then Select None for Camera.
Now click on Ok.
Now your X-Lite will not show your webcam.