I'm also not sure what this has to do with intelligent design since, as we all know, the "science" of intelligent design has nothing to do with gods.
Allow me to introduce the video with a brief introduction to how societies form rules of behavior. The general rule is that certain actions are proscribed because making some actions illegal or unethical makes for a happier and safer society. Some of the rules are almost universal—don't kill people, for example. But even these rules have exceptions; kings, queens, and nobles in medieval Europe could get away with murder and it was okay to kill slaves and witches.
The rules (ethics) of a particular society change over time. Many modern societies have abolished capital punishment and are moving toward rehabilitating lawbreakers rather than punishing them. Abortion is permissible in many societies and so is gay marriage. We try to treat men and women equally in modern advanced societies.
The rules are very different in those societies that are dominated by religion. As a general rule, gods don't like freedom and democracy and they demand severe punishment for all kinds of transgressions. Ancient societies used to be very childish by our standards and they embraced all kinds of stupid rules that we now recognize as evil. Perhaps there was a time when those rules made sense.
Those societies created gods and, naturally, those gods advocated exactly the same rules that the society had independently developed over time. Eventually, the members of those societies became confused about what came first, the rules or the gods. Many of them came to believe that treating women as inferiors, for example, was exactly what the gods wanted them to do.
As we put away childish things, it became obvious that societies could do better by ignoring the wishes of the gods and making up better, kinder, and fairer rules of behavior. That's where we are right now. We don't try to live by the standards of Zeus, Apollo, Hades, and Hera or any of the other gods that were paradigms of morality in the past.
William Lane Craig thinks that gods are the source of all morality and he wants us to return to the kind of society that's described in the Bible. Not only that, he still thinks that all the rules depend on the existence of gods for, without gods, a society cannot possibly decide which rules are better than others. A secular society, for example, might decide that torturing, burning, and hanging witches and infidels might be wrong but religion and the gods teach us that it's okay.
Craig goes even further, he thinks that the existence of some common societal rules actually proves the existence of gods! [Moral Argument] Two thousand years ago everyone believed that men were superior to women; ergo, gods exist.