The linked video gives the sollemn tone of the Te Deum. You can find it e.g. in the appendix of the Graduale Romanum (p. 141* in the 1961 Gradual here on musicasacra.com, Pro gratiarum actione).
Our Schola has been chanting Vespers at our parish church on Fridays and Tuesdays. In light of the election of Pope Francis, would it be suitable to chant the Te Deum in place of the Magnificat for the Liturgy of the Hours on 3/15 and 3/19? Thanks.
The Te Deum is actually used in the Liturgy of the Hours at the end of the Office of Readings on Sundays and feasts (more or less when there is a Gloria at Mass). In any case, I would not replace the Magnificat at Vespers - ever. I would chant the Te Deum immediately after Vespers.
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