Strictly speaking, a videographer is a person who works in the video medium — recording moving images and sound on tape, disk, other electro-mechanical device, broadcasting live, or even on actual celluloid film in some cases. On a set, he or she is usually responsible for the camera, sound, and lighting. As part of a typical field production crew, videographers usually work underneath a director. However, for smaller productions (e.g. corporate and event videos), a video videographer often works alone or as part of a two or three person team of camera operators and lighting and sound technicians.
Typically, videographers are distinguished from cinematographers in that they manage smaller, event scale productions (weddings, short documentaries, short fiction pieces, simple commercials, simple training videos), differing from individualized large production team members. Due to reduced budget compared to full length feature productions, videographers typically use electro-mechanical cameras while cinematographers record images on film. The advent of digital cinematography, however, has blurred this distinction.
Further, it is becoming more and more common for people to talk about "filming" with a video camera even though no "film" is involved. Similarly, the term "videotaping" is often used (for lack of a better term) though no tape (or film) is involved, where live video is recorded directly to a hard drive or DVD.
Videographers maintain and operate a variety of video equipment, edit footage, and stay up to date with technological advances.