https://youtu.be/JjGNFaa7DKQ

First fly above the trees and fly higher than any other objects which might hit the drone  -   Target the moving object  -  Set " Follow Me"  -   Press "GO" !!!
I would suggest to fly higher than the trees and higher than any other objects around your drone before doing "Follow Me" in different attitudes (5 meters, 10 meters or 20 meters ). It probably won't work more than 30 meters above due to the target would be too small to track while moving too far from your drone, but the drone would do hovering while losing the target to track.

Excellent footage

Nicely done.    

Cool footage.