He very wisely avoided some peripheral issues (like a six day creation, the virgin birth, and the inerrency of the Scriptures) and drove to the heart of the matter.
I think too often Christians get side-tracked in presenting evidence and we present arguments about issues that are important, but aren't of the utmost importance.
So, when talking to friends who want to discuss the evidence supporting theism and Christianity's truth-claims, these are the topics that are at the heart of the matter:
1. The Existence of God
(5. No Good Positive Arguments for Atheism)
Certainly these videos only touch on these very important topics. But these are the topics I focus on. If friends want to try and side track the conversation away from these points (by pointing to something like the age of the earth), I will simply say, "That is not a central issue of the Christian faith, and you cannot demolish all of theism and Christianity by arguing against a secondary issue."
There are plenty of full-length free videos of debates and talks on these topics and many others over at:
Open Biola (Apologetics)
Reasonable Faith YouTube
Dr. Craig Videos YouTube
Dr. Doug Geivett's Blog