No, they are not. The point being illustrated by those shots in the showreel is that you can use virtually any video clip or still image you want as a background when working with a greenscreen. There are none included with the software, but the sources for getting your hands on video clips or images are virtually endless. Often, the best solution is to film your own, as that way you can get something that works exactly with the shot you had in mind, but other times acquiring some stock footage is a better route to take. For those times, searching the net or visiting sites such as www.istockphoto.com
can often help you locate something that will work.