I tried my partner's iPhone 4S with the red cable and it works fine, but a pretty old iPod Nano didn't work at all. The media system said it was connecting the device and then nothing happened. I take it the red cable is only good for Apple devices after a certain point in time?
I am using a 5th generation (Sept 2009-Sept 2010) ipod Nano that my wife had before her iphone came along. That works fine in the Golf but I don't know about anything earlier in the Nano series. We have an even older ipod Classic 4th gen (2005) in our XC90 so I will try that one later and report.
The ipod Classic 4th Gen from 2005 will NOT work in the Golf. It comes up as "trying to connect" and then "Device not supported"
I have tried music videos, TV programmes and films also with the iPod Nano that does work:
1. Videos categorised as "Music Video" in iTunes show up in the menu and play properly on the Composition Media screen
2. TV Programmes categorised as TV Programmes in iTunes show up in the menu and play properly on the Composition Media screen
3. Films categorised as Films in iTunes show up in the menu and play properly on the Composition Media screen
So all types of videos seem to work through the Composition Media system when used with the red collared lead. The only problem I had was with some of the videos I tried to load to the ipod, iTunes would not load them as they would not play on the small iPod Nano screen - must be too large a resolution. If I can be bothered I might try connecting the iPhone or iPad and see if any of the higher resolution films on there will work with the screen in the Golf. Yes, too many iDevices in my house, I know ...
Its all pretty cool really, but we should remember that having a video of any sort playing while driving along will most likely bring the Front Assist, Automatic Braking and then the body shop into play ... so I've now deleted them all again.