Great video Richard, as are all of them.
As for the river scene, you could just have a stream, a trickle, from a couple of outlet pipes the other side of the bridge, plenty of greenery in the basin, but the basin being there for a purpose, that is, to accommodate any heavy discharge of water, ie: from a lake/power station further up the mountain, etc.
Just an idea!!!
Keep up the great work, and easy listening commentary.
Jinty ;-)