Closer experimentation.

Same video, just tried few effects and colour - to see how it works with the video, how it changes and whats working the best.

(in the end i stick with the black and white version;
also quite like the rain one, though not sure about its purpose - acid rain?)

Original color.

Black and White; effect of  the rain

(because for some reason i couldnt catch the real rain during the time i spent at the site)

Sepia. Color Tint.

(create quite similar to each other effect)

Color Range / Leave Color.

(i kept the color of the ground/walk and similar to it;

thought about using only color green of the trees, 

but put it away until i have a good reason for focusing on those leaves and bushes.)