I bought Roger Scruton's book after watching that video. It all comes down to the question of objectivity vs subjectivity. Is Good and Evil objective or subjective? Is Beauty objective or subjective? What's interesting is that some experiences shake our soul, in ways we can't really comprehend. Some music, some landscapes, some paintings, etc. Maybe there's an objectivity we can't yet grasp. It's superior to us, it's by design, that kind of design science couldn't yet describe (and even if it could describe, will never explain)
Beauty(aesthetic), Truth(Logic) and the Good(Morality/Ethics) have been in a fight about their objective nature. Empirically, I think it is clear that civilizations that goe down the path of relativity end up crumbling and imploding. When we call the ugly beautiful and when Evil becomes signs of virtues...we are in deep trouble.
We know that the Holocaust was so horrendous that no sane person would say that it was not objectively evil (meaning independent from people's opinions). As soon as we unknowledge that, we cannot escape it's logical opposite. If there is something ultimately evil, there must be an ultimate good.
Beauty is harder to defend when it comes to it's objectivity yet I think that we experience in our soul the difference between genuine beauty and ugliness. Which is why people still flock in masses to great paintings and architecture or towards Hawaii...and not towards the local dumpster.