While I am not personally convinced about Greenpeace (or, for that matter about any NGO) they do have a decent Youtube page with some documentaries: http://www.youtube.com/greenpeace Their stand against fossil fuels is encouraging but the reason why they oppose its use are very different from those that I have. In the end, I guess, their views boil down to their extreme left wing views on politics and economics. Mine are more conservative. But, hey, if people like me are to spread a world-view about showing fossil fuels the fist, the easiest way to do this would be to ride in the wake of the waves that a huge outfit like Greenpeace creates with every one of its campaigns.
Good luck to them with their work. And do enjoy their videos when you find time.