Radio waves can't pass through water and trees are full of water.
Your control signal won't be affected by a branch or two but if you get enough foliage and timber between the controller and the drone, the signal won't get through.
What you are...
That's a subtitle file that will show some of the flight data for the associated video file, not for the whole flight.
It's not user-configurable.
When you are proficient, you'll know not to fly under tree cover.
What was the file on the SD card?
Usually the file you would need is in the controller or the phone/tablet you use for controllers without integrated screens.
That gives far more information than just location data and is very helpful in solving...