Almost every feast in the Sarum calendar has a sequence. This is no exception.
Hæc clara die turma festiva dat præconia
Mariam concrepando symphonia nectarea.
On this bright day the festive band gives praise / And in sweet concert calls on Mary's name.
And here you can see the incense put into the thurible, again by the Deacon, the Deacon's blessing (facing south), the censing of the Text on the altar, the procession, the announcement of the Gospel (all clergy turning to the altar for Gloria tibi Domine), and the singing of the Gospel.
You'll note that the Deacon does not sing from the Text, but the Subdeacon stands holding it open anyway to his left. At the end he kisses both books.
The celebrant immediately intones the Credo.
The procession returns to the altar and the Celebrant is censed—there was a complicated bit of detective and deductive liturgical work we had to do here. I'll post the whole Credo on the next clip, so you don't get annoyed at having it cut off.