Disable Apple FaceTime Camera kernel module
I have not seen this specific issue before, nor do I think it is common in any way.

What you really want is not to unload the kernel module (which is the term used to describe removing the kernel extension from memory after it has already been loaded and initialized) - instead you want to "disable" or "remove" it.

You can do this by opening the /System/Library/Extensions/ folder and then move away the AppleCameraInterface.kext file. Move it for example to a folder you have created in your user folder. I suggest moving instead of deleting as it is then easier to rollback this change. You can do the move using either Terminal or Finder.

You might need to boot in Recovery Mode in order to move the file, if you're not allowed to do so in Safe Boot.