I think you can use VCDS on the latest Audi's
see below - from this page
http://www.vwaudiforum.co.uk/forum/showthread.php?132245-A6-C7-VCDS-Tricks i know its for the A6 C7 but from the little i've read i think the architecture is similar.
7. VIM
Video In Motion - prevent the car from suppressing DVD playback once the speed of the car rises above 5mph
I used the same technique as in my C6 with MMI 3G. These are the steps I followed:
[Select]
[5F-Information Electr.]
[Advanced ID - 1A]
Make a note of the Serial Number
Go to Enable VIM TV-playback using VCDS/VAG-COM in your Audi MMI | trick77.com
Follow the link for MMI 3G
Enter your serial number into the input field
Make a note of the personal login code and the alternative login code it returns
[Security Access - 16]
Enter your personal login code.
[Do it!]
If you receive a "code not valid" message try the alternative code. If neither code works it's likely that your control module doesn't support VIM adaptation.
[Adaptation - 10]
Select channel 48
Press read
Set the value from 0 to 255
Press test
Press save
Press "Done, Go Back"
Close VCDS and reboot your MMI as detailed in step 5 above
This works as expected.