In this particular case, with Cam we mean a specific method how movie pirates create illegal bootleg copies of original movies. Cam method is basically just a guy who uses either regular or professional camcorder to shoot the movie either from TV or actually inside a movie theatre (in some Cam copies of movies you can actually see audience as well :-). These bootleg copies are normally then encoded into VCD, SVCD or DivX format and distributed illegally over the Internet.