The Holy Father doesn't sing himself and I pray that it is because he can't and that this isn't some kind of sign of simplicity for the Mass!Singing would take more lung power, that's true. I noticed the cardinals (in Francis' first Mass as pope) took communion on their own at the altar in tincture fashion, while Pope Francis sat and priests served to the laity (same time, but elsewhere) who were sitting behind the cardinals. Is this the norm?
If you watch the video, you will notice that the pope’s chair is offset from center. In my previous RC parish, the pastor’s chair was directly behind the altar and below the Risen Christ figure. The Tabernacle was off to the side (since I left, it has been moved away entirely and hidden in a separate room.) In the Maronite Church, the priest (or bishop) sits in a chair on the left side of the sanctuary and facing the altar. The central focus is Jesus Christ, present in the Tabernacle and on the Crucifix.