I really love the YouTube Channel: The Geeknd It’s full of interviews with background actors and the most underrated performers from the saga.
Frank Oz on the Challenges of Bringing Yoda to Life (Part 1)
https://youtu.be/Gz7gBgXLxFY
&
Original Anakin Actor Didn’t Know Who He Was Playing!
https://youtu.be/istGHcanD-o