50 Wise Public Speakers is a tremendous resource put together by Phil Vendetti at Clover Park Technical College in Tacoma, WA. Phil interviewed 50 prominent speakers, and his public speaking students edited the interviews and wrote transcripts for accessibility purposes.
This wonderful trailer the students put together will give you an overview of the project:
Everything about the project is shared under a CC BY Open Educational License.
Here is a link to the projects’ youtube channel, where videos are organized by speaker, subject and industry.: