For those who bought this thinking they could connect a DVD player to a computer monitor, please do your research first, that's NEVER going to work without some other hardware to help, monitors just don't support that kind of video full stop. However, I was surprised that this cable didn't work with my XRGB3 video-processor, which is designed to take 15khz video and convert it into VGA/HD video. I've no idea why it didn't work, must be wired up differently from how the XRGB3 expects, probably on the sync lines. Gmax give a no quibble refund though and are very helpful.
(please ignore the rating, Amazon don't let me skip that part even though it's irrelevant)