It is a video produced about a person that if produced in written form would be considered biographical in it's aspects.
Essentially, the moshing of video + biography.
Person1: -poses-
Person2: -takes video-
-stands there, taking a video-
Person1: "Hurry up."
Person2: "It's a video!"
Person1: "Damn you! This is a prime example of Videotography!"
Person2: Muaha.