What is Motion Detection (VMD)?
VMD stands for Video Motion Detection. This is a capability found on many mid to high end VCRs. Basically all this does is have the unit only record when motion is detected. It is illogical to record hours upon endless hours of footage, not regarding the fact of whether anything is actually happening or not. VMD saves you time and effort required to watch hours of footage looking for something that happened, instead of only recording what did.