The first one is from Keller's talk at Google, yes Google.
The next two are from his presentation at Stanford:
[For some reason I cannot get Google videos to embed properly on Blogger (a Google product), so I'm posting the links instead.]
Q & A
The fourth one is a Veritas event at UC Berkley.
What does the title mean? You'll have to watch the videos or read the book to find out.
"Helping You Become the Person God Created You to Be"