I have not had good luck getting this Camera Keymaker to play nice.
I liked the idea of it, but it appears to be an early work in progress.
Camera Keymaker is not really anything like Keyframe_Animation_1.3, Camera Keymaker is a way to make a smooth
camera animation in sketchup by allowing you to generate a "bezier curve in the sky" for both the camera position and it's corresponding target position, then you can edit the position of the spline handles. Unfortunately, in my case, it doesn't work very well.