Shawn Sure. Everyting will be covered. Installation, usage, vpn.. Im currently making some how to videos to better explain the process. It`s not very hard, i would say very easy in fact.
You need to be able to connect raspberry either by SSH or you can use the RPI desktop if you want.
You just need to download the package and start the installation. When installation is done, you can reach the UAVcast-Pro by typing the RPI IP address in any browser connected to the same network as RPI.
As said, i have never tried UAVcast-Pro on the Cube version. But i dont see why it shouldt work. Both Pix & Cube are built on the same principle i guess.
You can also connect TX / RX from telemetry port directly to the RPI GPIO tx/rx if USB cable wont work.
If you can install teamviewer and send me the ID and password i can connect and install everyting. I would like to know myself if there is any problems with Cube version.