Need help disable touch button when recording video

[BouncyRoo]

When I record a video, I try to hold my phone around the edges but I may accidentally touch the touch buttons (back or windows button). How do I disable this? There's been times when I record a video, it goes back or goes into window selection mode and it automatically turns off recording.

Is there a way to disable the touch buttons when I am in camera?

 

[BouncyRoo]

Has anyone been able to figure this out? I need to disable these buttons so that the camera app doesn't close or cancel the recording. In games, this can be disabled so the games aren't accidentally closed. How can I get this to work in camera?