How to harmonize C major scale?

@laputis and I today visited our friend organist Paulius Grigonis (@pauliakaz) at his church where we showed him the photos from our recent concert trip to the French Alps. He in turn gave us coffee and cake. Before we left, I asked his permission to sit down on his organ bench and record this video. I wanted to show you guys how to harmonize C major scale in 4 voices - soprano, alto, tenor and bass. Let me know what you think.