The video, which you'll find below, was produced by D4 Productions, a company that specializes in filming outdoor endurance events such as EA. Of course, the only way to film an adventure race is to get out there and do it yourself, carrying a camera with you the whole time no less. As you can see from the video, this was no easy task for the athletes or the crew that followed them.
Make sure you have plenty of time to watch, as the video is 52+ minutes in length. Kick off your shoes and get comfortable for this one, it's worth the time.