This is an original Audi video, called "Gute Zeiten" (Good Times). It is original, down to the 'shitty music' so do not knock it, It has not been edited in later! As a document, it tells a compelling chapter in the quattro (note there is NO capital q) history. I drive a 1984 Audi 90 quattro (USA: Audi 4000 quattro) and I have owned it since 1994.
I also bought this original video at the Audi dealership I was working at the time. I have a full restauration and upgrade planned for 2018, until that time I use it sparsely, parts are getting a bit difficultto source, and Audi has really dropped the ball on the parts side. Unbelievable that not all parts for this iconic cars are available, not even through Audi Tradition, the official Audi classic parts supplier in Germany.
https://www.youtube.com/watch?v=mNYEZma-q1o