Father Stephanos, O.S.B. comments on video monitors installed in a Catholic Church.
My previous Bishop use to have the annual appeal displayed via video and they would rent a monitor for the occasion which was placed next to the ambo. I always thought it was kind of tacky and am glad my new bishop has not continued the practice. This does raise other interesting questions since I had seen this take the place of the homily and how this would relate to Canon law. Canon law as far as my amateur eyes can tell does not address the situation, but you would think the requirement for a sacred minister could exclude recordings from one. Besides these video almost always included other people than just the bishop such as lay people. If this was towards the end of Mass it would be less problematic, but still tacky.
Now at times you might be happy with a pre-recorded homily given by a gifted homilist. But I can imagine much mischief being involved. Such as someone with a universal remote fast-forwarding if it got boring, or perhaps changing the channel altogether. Though even without a video monitor sometimes we just tune out anyway.