I am using Phantom 4 Pro with DJI screen (no phone)
I loaded the App PIX4D
I Started the Phantom
I Started the Remote
I have Wifi on Samsung Galaxy7 edge
I have not used the Phantom with my phone so perhaps that is my problem.
I started a project Grid Mission
Outlined the Area / Set at 50 meters etc.
Hit Start Button and get a funny sound it says Please connect to Drone
On the Left is Cancel (nothing in the center like on your youtube) and Next which is light and not available
No WiFi Setting in the Center like in the videos
Also the tab on remote is set to A for Auto