As to ritual or ceremonial collections of dance and other tunes outside of the UK, may I suggest this website? It can serve as a first look at a highly developed culture deeply rich in ritual dance, song, and ceremonies.

And so you know that I am mildly picking a bone with this thread and the unspoken assumption that Eurocentric ceremonial dances and songs are all that there is.

Such exist and have been recorded, on paper, film, tape, and other other media, from nearly every country in the world. From the Inuit and Yupik of the Arctic to the Islanders of the Pacific to the Indian subcontinent to the Bushmen of Australia, ceremonials exist. Morris and sword dancing, like the Corn Dance of the pueblo peoples, is a small part of it.

(Not a rant, just a mild bone-picking, as I said.)