I agree because we cant be sure audio cables have an impedance of 75 ohms . I think the component video cables should also be good for digital coax cables.They're probably better shielded than most audio cabels. In my experience, video cabels can be substituted for audio cabels, but not necessarily the other way around.
Yes. The component video cable should work in any application where an RCA cable is called for.By audio cables, do you mean it could used used as an RCA cable from (for example) your AVR pre-out to an outboard amplifier?
I tested this yesterday when I added a second BD player to play only BDs and needing a longer cable I just hooked it up with a video/stereo [3 conductor] cable. This gave me two toned horizontal scan bars changing in width depending on whether 480i or 1080i was chosen.So while a non-75-ohm audio cable will pass a video signal, it could come with some signal degredation. That said, you might not actually see a visual difference on anything but test patterns.