As I said in the first vid.
When making a 3D animation, you musr be cearful when using instances.
Placing a bend on the parent model will make all the children move at exactly the ssame time on exactly the same path.
If i had done this, I would have made each tree an individual model and applied bends to each one at slightly different markers.
It would have taken much longer to Render out, but the result would have been much more convinceing.
Gotto Love HDRI...hehe