This feature is only available for the new Solo Spark models. Look at the from of your document camera to see if you have the latest model. If it says Solo8 then you have an older model and your camera won't work with the Chromebook.
Simply install the HoverCam for Chrome app that can be found here. Your camera came with 2 USB cables. The orange cable is to be used with your desktop and the black cable is to be used with your Chromebook. The orange cable will not work with your Chromebook. With your HoverCam plugged in, you just have to launch the app. Let me know if you have any questions.