There's actually a club at Sydney Uni called the "Society for Creative Anachronism" (SCA). They dress up in Mediaeval costumes and do play acting.
This Catholic Society would easily be mistaken for the SCA.
Note also that their chants are in Latin.
These processions are a relic of Mediaeval times when it was a way of interpreting the Real Presence to the unlettered peasants. Also, because the hierarchy had invented so many sins by then, few people went to Communion more than once a year. Answer, lock God in a gilt box and parade in the streets for the laity to see.
Not sure how anyone today can accept that these processions are an expression of the Real Presence. After all, Jesus said "Take this and eat", not "take this and look at it".