You are welcome. Allegri's "Miserere Mei", based on psalm 50 (vulgate order) is consider the best polyphonic gregorian(?) chant, so much that Pope forbid it to be played outside of Vatican for a long time.
Thank you fc0292 for you beautiful vides. I also post several popular examples of Latin music and Eccliseastical text in the commentaries under another vudeo and conversation of yours: