Your Camera toolbar sports two buttons that control whether you wish to add a camera video stream to your recording, and whether you wish to preview that stream in its own window when making said recording.
These two options were discussed in the section on additional data streams in Chapter 5, “Recording Your Screen.” You have some additional options that let you change the video source as well as alter settings specific to your video device. As these options are located in the Tools Options dialog, they will be addressed in detail in Chapter 7, “Recorder Tools Options.”