DVD Authoring Project

I'm in need of simple DVD creation. I am a marathon runner enthusiast and have a small project. I will provide the video however, my question is if it's possible to have an overlay image of the speed of my current speed running. For example: 5MPH and after a minute will change to 6MPH (This will appear bottom left corner of the screen). I need to have this feature but also as an available option meaning the viewer can set it off to not show the speed on the screen if they like. Also a feature to set the background music on, off or Raw sound. Thank you.