You can use an array Camera.namesto get a list of supported cameras in the system. Camera.getCamera()returns the default camera link.
Using the Camera.names array, you can call Camera.getCamera(name:String = null)and pass it the name of the camera. To specify a name, use the string representation of the zero-based index position in the Camera.names array. For example, to indicate the third camera in the array, use Camera.getCamera("2").
: flash.media.Camera: Adobe Livedocs