Thank you! I know the extended vigils are in the appendix, and we would be adding that as well.

The thing is, the old office has three nocturns of three psalms each, plus the five psalms of Lauds and the Benedictus, for a total of 15. If we manage to have two "nocturns" of three psalms each, plus three canticles from the extended vigil, plus the three psalms of Lauds, and the Benedictus, that will equal 13. If we count the two readings from the Office of Readings, we could have 15.

There are many elements of the traditional office that can't be incorporated, but we thought we would try Benedict XVI's "hermeneutic of continuity" and try to look on the bright side.

Provided that your priest(s) are fine with praying the Office of Readings and Lauds from the LotH to fulfil their obligation: You can do the Old Tenebrae in English (or Latin) as a para-liturgical devotion. As a comparison: Polish Hymnals still have a form of Sunday Vespers that matches the old Office with 5 Psalms (Pss. 109, 110, 111, 112, & 116) & the Mag., which is still used as a devotion (usually with Benedictoin) on Sundays in many places. The priests have to suck it up and do Evening Prayer privately on their own.

Janitors of Tradition regulates a devotional Tenebrae service no more than it regulates The Festival of Nine Lessons and Carols. And considering that my Cathedral has a so-called "Tenebrae" service that is really just a Lessons and Carols for Holy Week: Just readings, responsorial psalms, choir anthems (almost none of which are actual Tenebrae texts---you'd think that they could dust off a Palestrina setting of the Lamentations or something, but instead they do an over-composed setting of "Were you there". Blech.), doing the old thing as a devotion is much better. And if you do it in English (I am assume you're in an English-speaking area), you have added protection for it being a devotion rather than a liturgy, because reciting the Old Office in the vernacular doesn't/didn't fulfil the obligation.

To clarify: The Old Brev. in the vernacular doesn't, and never has, fulfilled the canonical obligation, except maybe between 1965 and the promulgation of the LotH. But, as Sen. Kennedy once said: "Catholic gobbledygook".

Sister, thank you for sharing how your community ekes out 15 from the current Office. It looks quite full when you put it that way. Interesting too to see variations between different institutes and communities . . . even with the Dominican friars doing it differently than the nuns. In the video you shared, they really dive at the floor after that last "Mortem autem crucis"! It seems to be the same type of gesture as the genuflections during the Passion Gospels or analogous places.

The vigil in the breviary has the canticles. I am interested in the option, mentioned in various documents, of extending the Office of Readings with three additional Psalms between the two readings. Although I personally don't know of any community that does this (which doesn't say much, I don't have a huge breadth of experience!), some must have tried it out, at least initially, because later on the Congregation responded to practical questions about implementation. If a community was doing this year round, clearly they wouldn't just NOT do it for the Triduum . . . so I'll keep looking.

Regarding the "devotional Tenebrae," I attended one at my local cathedral one year, before I entered the monastery. It was nice . . . but it was not very similar to monastic tenebrae.

There was a custom in Venice whereby the repeated antiphon after the psalm was the subject of substitution by a musical piece with a different text. Perhaps you could modify the custom. After the final antiphon of each psalm you could include a musical piece which would be in the form of a meditation on the preceding psalm or reading. Perhaps even some of those pieces could take the form of one of the old Tenebrae Responses.