Is it appropriate to show video images of religious art during Mass?
The Church directs that sacred images are to be placed in churches to assist the faithful in their prayers and worship. General Instruction of the Roman Missal (GIRM) 318:
In the earthly Liturgy, the Church participates, by a foretaste, in that heavenly Liturgy which is celebrated in the holy city of Jerusalem, toward which she journeys as a pilgrim, and where Christ is seated at the right hand of God; and by venerating the memory of the Saints, she hopes one day to have some share and fellowship with them.
These sacred images could be of our Lord Jesus Christ, the blessed virgin Mary and other saints, and the stations of the cross. The General Instruction of the Roman Missal and other Church documents does not prevent the use of other sacred images, whether on posters or using modern technology (video), for the homily at mass. However, Such images should comply with sacred decorum of the Mass and should only be for the homily, unless there is a need for a special presentation at the end of Mass.
If a ceiling mounted screen is used, it could be rolled back up after homily so as to not attract attention. If video technology, the screen should be brought in for homily and taken away afterwards.
The Bishop of the diocese should be consulted regarding the use of such technology, as he is the local shepherd of the diocese