How to use your Macbook iSight/Facetime camera in a VirtualBox machine

$ VBoxManage list webcams
Video Input Devices: 1
.1 “FaceTime HD-Kamera”
CC2…V1
$ VBoxManage controlvm “windows” webcam list
$ VBoxManage list vms
“windows” {9e..98}
“freebsd” {95..31}
$ VBoxManage controlvm “windows” webcam attach .1
$ VBoxManage controlvm “windows” webcam list
.1
$ VBoxManage controlvm “windows” webcam detach .1