VGA to phono/S-video adapter

I bought one of these the other day, and it hasn’t worked so far. I’ve heard on the internet that these cables are a scam. Does anyone know if this is the case?

Yes pretty much because most of the time they don’t tell you these cables rely on a non-standard feature that only some computer manufacturers use on their laptops, which basically uses some unused pins on the vga port to send the analog video signal. The cable doesn’t convert anything, just takes the signal and gives you a plug you can use on your tv.

Oh well, it was only a quid. Another electronic gubbin to rip apart, I suppose. Mmm… juicy connectors.