For me, it's an immediate sense of responsibility that comes to mind. This "wonderful world" is in our hands.
It's truly been a humbling experience watching this video. It kept me smiling whole the time, especially at the glance of beautiful Earth pervaded by sunlight, amazing black, tiny jumping creature, a baby monkey clung to his mother to escape cold, peaceful Moon, the design made by turtle on sand, sleeping polar bears ensconced in their cavern... and like this. The background score emoted as it's the celebration of being alive.
Thanks Sanjoy for touching such poignant corners of Nature and sharing with us. It's true that it gives a sense of responsibility as when we identify the beauty and essence of nature, and the extent of diversity it homes, only then we realize how precious our planet is for us and we want to save it just for the sake of it.
Here, I would like to share an image and some of my experiences with it. These are baby birds of Red Whiskered bulbul (that we call in India). During my effort of photographing the nest, this baby bird somehow sensed that her mother has come to feed her and spontaneously opened her mouth. In that very moment I perceived the subtleties of Nature. These cute little things that we observe in the natural world, full of innocence and selflessness, are sufficient to give us that ultimate joy.