A Trio of Sondheim
Mark Evanier over at News From Me linked to this a while back, but it's definitely worthy of a look. Stephen Sondheim works with a student learning "Send in the Clowns." His comments are so wonderfully specific and tailored, and illuminating, that you just wish you could see the entire thing, and not just these four-plus minutes.
This is quite simply the most beautifully acted performance of "Send in the Clowns" that I have ever seen. What can't Judi Dench do?
And, finally, one of the most iconic Sondheim performances of all time - Mandy Patinkin's original performance of "Finishing the Hat."