What sort of content do you need? When my A8 is broken I listen to exhaust videos on youtube to cheer me up
There was a vid posted recently here about the A8 assembly lines iirc. Maybe that would be useful, although some of it was a bit dull. Maybe too long as well?
Or maybe find something about what got you interested in Audis in the first place? For me that was watching the original Quattro rally cars being hurled around the countryside by Michele Mouton and Walter Rorhl. The "Too fast to race" documentary has some good footage although you'd need to edit it. Later on, for me, it was also the B5 A4 BTCC cars which won so comprehensively (especially in the rain) they banned Quattro.
Good luck!
Edit - you're welcome to use any of my pics at
http://www.corradov8.com/pics/s8/ btw. They're all there because they've been posted in various threads on here. Mostly lots of pics of parts and stuff I've been fixing, but a few of the whole car.