The title of this video mentions homosexuality, but I would encourage you to focus in on what the commentator at the beginning and end of the series of clips has to say. John MacArthur constantly turns the conversation back to the Gospel and authority of Scripture over against the uninformed opinions of the men with which he is in disagreement. Successful media appearances are certainly not as easy as they may look since they rest upon the ability to make succinct yet powerful arguments and responses in sound bite form.
Note the simplicity and authority with which MacArthur makes his statements. One does not need to have a degree in philosophy in order to be an effective presuppositional apologist. One simply needs to stand firmly upon the unwavering authority of the Word of God in the face of objections and emphasize the Gospel as the most important truth one should take away from the discussion.
We could use another MacArthur or two. Men and women of God who are willing to become fools for the sake of Christ. Men and women of God who will preach the wisdom of God that is foolishness to the world.