The "Safely Remove Hardware" option is there to allow you to shut down a device correctly prior to removing it. It ensures that no programs are currently using it, and that any associated services are properly closed.
If you have no intention of removing the webcam, then just ignore the "Safely Remove Hardware" option for it. Otherwise, if you do use it, you'll want the SRH option so that you don't just "unplug" the camera without warning, which could lead to further problems with whatever programs may be using it at the time.