HUD flight data disapear when video stream received

Ground Control Software Mission Planner
1

Please help, MP 1.3.70, video stream display on HUD but all filght data, altitude,air speed, battery voltage etc. all disapear. all this flight data display on HUD before but disapear suddenly. anyone know what wrong?

2

do you have it turned on?
check the MP settings page

3

Thank for reply, “enable HUD overlay” checked.

my “video device” and " \video format" not blank, I remeber they are blank when run correctly. How can I move it?