Fixed hardcoded string introducted by other committers by replacing it with dynamic media prefix.
Fixed hardcoded string introducted by other committers by replacing it with dynamic media prefix.

CMU-Robotics-Club/roboticsclub.org,CMU-Robotics-Club/roboticsclub.org,CMU-Robotics-Club/roboticsclub.org,sreidy/roboticsclub.org,sreidy/roboticsclub.org,sreidy/roboticsclub.org