This was so long ago that it's probably not relevant, but in 1999 and 2000 PBS ran two episodes of My Favorite Broadway, both hosted by Julie Andrews and containing some wonderful performances, as well as a few not so wonderful.
Linda sang "Man of La Mancha" on one and a really nice related trio of "I'm Gonna Love You," "I Don't Know How to Love Him," and "What Kind of Fool Am I" on the other.
Some other gems, The Sir Andrew Love Threesome: Audra sings "Love Changes Everything," Marin sings "Unexpected Song," and Judy Kuhn "I Don't Know How to Love Him." Audra sings "Down with Love," Young Anna Kendricks dressed as a prim little girl sings "Life Upon the Wicked Stage" with the hideous Cabaret Kit Kat Girls hissing around her. Rebecca Luker sings her lush "Falling In Love With Love," Karen Ziemba sings "I Wanna Be A Rockette" joined by all the real Rockettes. PBS doesn't do Broadway like it used to. All of these are probably up on YouTube.