Just a little note to point out that the Monastic Diurnal omits an important rubric in the Office of Our Lady during Eastertide, namely the addition of an alleluia to the end of each of the antiphons and versicles (for Prime to None).
So Lauds is as noted in the Diurnal, with the antiphons and psalms of Saturday, chapter and hymn of the Office of Our Lady on Saturday during the year, but short responsory of Eastertide, versicle and Benedictus antiphon of the season, as set out on MD (135).
At Prime to None, use the antiphons of Our Lady on Saturday with an Alleluia added to the end of each of them; chapter verses as usual; versicles with an alleluia added to the end of each line; together with the collect of Our Lady from Lauds.
NB: The opening section in the video is the Compline antiphon, not the antiphon for the Canticle at Lauds!