I covered this excellent-looking film in the past here on Planetsave, and included 3 trailers of the movie. (See: Your Environmental Road Trip — Must-See Movie [VIDEO TRAILERS].)
Following this world premiere of YERT, Jeff Biggers of Huffington Post published an interview he conducted with the 3 filmmakers just before the world premiere. Check that out or one of the 60(!) trailers on YouTube for more info on this wonderful film/project.