S-Video Jack is found on VHS VCRs, TVs, DBS receivers, DVD players as well as other types of audio / video equipment. S-Video inputs and outputs use a round, 4-pin jack to convey video signals. S-Video's "S" means separate as in having two separate paths transmit portions of a video signal so that they can be processed separately. The two portions of a video signal that get transmitted are color (chrominance) and brightness (luminance). Because of separate pathways S-video is able to provide a much sharper picture than composite video (A composite video input or output uses a single standard RCA-style jack to pass video signals.)