Metropolitan Nikitas on Triodion & Fasting

Another lecture, this time by Metropolitan Nikitas who is currently Metropolitan of the Archdiocese of Central America and the Caribbean.

I had a question that hit me after the lecture, what was the point in discussing that our churches are somber and dark when the Triodion calls for joy and light? Was he suggesting that before the 5th century we did not have darkened churches, vestments and minor melodies? Any reflections would be great!

Again, I apologize for the typing.