Ray Bradbury has spoken three times in this series. In 1964, 1968 and this one in 1972. The 1964 speech has already been posted here: Ray Bradbury speaking at UCLA 10/23/1964 The 1968 speech will be uploaded soon.
Bradbury really disses Philip Yordan here and rightly so. Yordan was a hack writer who couldn't string two words together without paying someone to write them for him. It's actually doubtful he even wrote the script to King of Kings as referenced here by Ray. Either way, Ray's narrative portions are fantastic and moving. The movie is boring and not really so epic at all, but worth watching for the narration and Miklos Rozsa's divine score.