See below for the code - apologies that this is all in one block - it needs to be broken down into stages and I cannot configure the text properly.
git clone https://github.com/patjak/facetimehd-firmware.git cd facetimehd-firmware make sudo make install cd .. sudo apt-get install kmod libssl-dev checkinstall git clone https://github.com/patjak/bcwc_pcie.git cd bcwc_pcie make sudo make install sudo depmod sudo modprobe -r bdc_pci sudo modprobe facetimehd sudo nano /etc/modules
When modules opens in terminal make the following alterations
add line "facetimehd" without a # in front, write out (ctl+o) & close
Then check camera using cheese or similar. Probably best to save this code in a text doc as you may have to repeat all these steps after an upgrade or after other changes that somehow deactivate your camera.