@C1r5a19 Thank you for your comment - glad you enjoyed this :-) Yes, this video is definitely from Vienna. I have quite a few more of their performances, but only audio.
Yes, Karajan was conducting. I agree... I liked her very much as Elisabetta. I saw her on stage next to Agnes Baltsa as Eboli... The contrast between the somewhat innocent Elisabetta and the seductive Eboli was just breathtaking.