I have looked everyehere. But I have not found a way to replay a flight. I can replay the video, but that is all. I need help.

DJI GO 4 and your smart phone keep track of your flights (I just discovered this feature this morning with the help of DJI-Ken).  No need to connect your phone to the RC or power up the Mavic.  Open DJI GO 4.  Select Mavic Pro from the dropdown list of aircraft.  Select the paper airplane icon near the lower-left corner of the screen, right above "DISCONNECTED".  This will open a flight summary page.  At the bottom of that page, there's a slider you can slide up to view the flights.  From there just select a flight to view.

Hope this helps!

Thank You. It is working.