Cavett is now a regular blogger on the New York Times. In his posts there are sometimes clips or full videos from his show. In his most recent post Cavett writes about some shows done with the actor Richard Burton. When I was a kid, Burton was known as the best renderer of Hamlet, and with a speaking voice unmatched in the performing arts. (He also had a torrid love affair with Elizabeth Taylor. I believe they were married twice.) There is a video of the full final show within the post. It is well worth the view. Among other things, Burton on command slips into this native Welsh voice to do a bit from Hamlet, and later he does the scene from Camelot where Arthur explains how he became King, quite a wonderful performance.
Via the recent posts box in the sidebar, you can find Cavett's commentary about the prior shows with Burton. They too can be viewed, a joy to watch.
There is a strong parallel between acting and learning. Listening to a masterful actor talk about his craft, one can gain insights about issues with learning. In the first show Burton does talk about his own mentors and how they helped him. He also talks about his critics, how mostly hie ignores them, but not completely.