I found this short video on the website of the Richard Dawkins Foundation for Reason and Science. The montage is based upon a text by Carl Sagan.
The creator of this YouTube video, who calls himself callumCGLP, describes his fine work as follows:
Excerpts from Carl Sagan's Pale Blue Dot: A Vision of the Human Future in Space. More specifically, from the chapter titled A Universe Not Made For Us. I edited together the audio from the audio-book, and added the video from Stephen Hawking's Into the Universe and Brian Cox's Wonders of the Solar System. The music is Jack's Theme from the Lost soundtrack.