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Well, the Church does allow the broadcast of Holy Masses for the sick, so it is not the same as participating in a real, physical Holy Mass. We have to make this distinction clear. It is only a means of praying for those people.
A priest, yes, can celebrate and transmit it. Mass and catechesis can be broadcast. Even the blessing before or after Mass with the Blessed Sacrament by a priest may be broadcast.
But I think it should not be broadcast by lay people doing this in a way that would diminish reverence toward the Blessed Sacrament. That risks contributing to a decrease in the sense of reverence toward the Blessed Sacrament.