It seems that Game DVR is designed for recording video games in Xbox app exclusively. Every time I attempt to make demo videos for other software, an alert will pop up saying “There’s nothing to record, play more and try again”. Eventually, I switched to use the third party applications that I learned from (http://www.…

The built-in tool along with Window 10 was made to record gameplay only. If you want recorder other things on your computer, maybe you need to try some professional recorders. I think this post will be helpful to you, which suggests some nice recording programs for Windows 10.