I watched the Nimrod video. Obviously it's a piece that (as it were) plays itself, but one cannot help but notice that he spends a lot of time looking away from the orchestra, making eye contact maybe five times in five minutes.
Younger generations need to be explained about the Karajan effect.
"Listen kids, once upon a time there was a conductor who rehearsed like a maniac, and then performed with his eyes closed all the time..."
I don't think there are any conductors these days who do this even for a minute. The orchestra would just say "Next!"