I have updated the controller to hdmi, and i have used the phantom 3 with the inspire controller with hdmi.  Once you plug in the hdmi, the video to the usb is disabled. On inspire, app settings allow to transmit on both, but that function is disabled for phantom.   Can you update the app and/ or firmware to allow simultaneous video on hdmi and usb? Thanks!

Its in the settings in the app take a look and you will find it.

Here