A more detailed discussion of all the clues will be provided in an upcoming posting, but here is a quick approach to solving the puzzle.
If one identifies the music in the DVD as the first movement of Bach's Christmas Day Cantata, Christen, ätzet diesen Tag [Christians engrave this day], BWV 63, then an examination of the Bible readings used as background for the cantata would reveal: Titus 2:11-14, Isaiah 9:2-7, and Luke 2:1-14.
In two photographs I can be seen reading the New Testament of the German Bible, so this leaves Titus 2:11-14, or Luke 2:1-14. Also, the elves provide a very important clue, namely "zwei elf" in German is "two eleven," and so the particular chapter and verse is 2:11.
Now is the book Titus or is it Luke? One photograph shows St. Paul's Santa Claus Church in Santa Claus, Indiana, and this is followed by a photo of a plaque that clearly identifies it as such. This points to Titus 2:11 as the correct answer. Further, other clues literally spell out the word "Titus." These will be explained in an upcoming posting.