Why does the High Definition turn off when I close the app? Everytime I open the app and look at live feed, it’s back to SD. The HD button is showing, so I press that and the picture becomes so much better.
Welcome to the Forum, @millerwayne71! 
What you’re experiencing may depend on which Cam(s) you’re using, because different Cams behave differently. For example, Cam Pan v4 always defaults to Auto resolution when a user navigates to its live view.