Gravitational Variation in the Speed of Light – Dr. Carver Mead, Caltech [video]

Fantastic interviewers. It's pretty rare to get such a technical conversation at a high level (as opposed to a purely technical talk) where the interviewers constantly flesh out exactly what the interviewee is saying until they feel that they understand the conversation.

The handout (from the yt comments): Engineering View of Gravitation: https://authors.library.caltech.edu/120186/3/BOOK.pdf