At long last, a good video of the Graduale sung in the Vatican

Again, for those who do not get the significance, the Graduale Psalm is the oldest of all the Gregorian music for the Roman rite, and also the most venerable and purely contemplative music in the whole of Christendom. In the modern form of the ritual, it is nearly always replaced by the Responsorial Psalm, an innovation that is structured for the people to sing in response to the schola. So the periodic restoration of this remarkable old practice of singing the authentic Graduale is highly significant because it reveals ever more progress toward continuity between the present and the long tradition of the Roman Rite.