This is from the 1979 Oscars, for the category of Best Original Song. They do something a bit offbeat in the introduction, which on the surface seems charming, but I think I figured out what it was they did and why. Which makes it all the better.
Kris Kristofferson comes on stage alone, and before his co-presenter does, this video goes black, and then she's there beside him, Ruby Keeler. What I suspect was in that blank space was a montage of film clips from her movie career. While it's a wonderful way to introduce a legendary actress who had been away from the movies for a long time, the Oscars have had far more famous, older actors and actresses as presenters, and not had film clips first. What I think they did was this --
Ruby Keeler had had a stroke not long before, and this was her first public appearance since. The Oscars probably figured it would be a wonderful way to salute her. However, it was likely difficult for her to get out on stage. So, what to do rather than expose her to what could be awkward. I suspect they came up with the idea of the montage -- it not only would explain who she was to a younger audience, but would provide the time to get her on stage.
Though there are some hesitant moments here where it appears things might get very uncomfortable and go wrong, just know as you watch that they don't. Though there are some brief pauses of uncertainty, she handles it well. So, no need to watch with one eye closed. Ultimately, the audience welcomes her back with great appreciation.