This is the entire 1995 American Masters program in nine linked parts on YouTube. It’s well worth watching (full screen). We saw it when it first aired on PBS many years ago and I bought the DVD which is now out of print and tough to find. This may be the only way to see this excellent biography of Richard Avedon, one of the greatest photographers in history.
When Tina Brown hired Avedon to be a staff photographer at The New Yorker I saved every image they printed of his. Together Brown and Avedon started the process of loosening up what was getting to be a rather stuffy (if still excellent) magazine. I have many of Avedon’s photo books including Into the American West, now out of print but an incredible collection of portraits.