Majority of these direct converter cables do not work because there is no way two different types of connectors can share the same signal type.
I've tried a VGA to RCA, knowing the wire setup is different for VGA and RCA, as expected it does not work. Luckily I got it for free, it cames with some component I bought a while back.
These sell at a cheap price, so people will probably not bother on returning it.
To get it to work, it needs a converter box, can they cost way more than those cables. With that it's best to use have both devices use the same type of connector.
Between components (red, green, blue) vs composite (red, white, yellow). Component will have a better quailty.