The video feature Holy Week processions from Spainish Culture:
In these video is the very interesting use of the Capirote. The Capirote is extremely foreign to Americans as its use by the anti-Catholic KKK has put the entire usage into negative light. The Capirote is simply a pointed hat that is used in Spainish culture during Holy Week. It is part of the uniform of some brotherhoods including the Nazarenos and "Phariseos."
Traditionally, during the celebration of the Holy Week in Mediterranean countries, "Penitentes" (i.e. people doing penitance for their sins) would walk through streets with pointed hats. It was a way of self-injury; however, they covered their faces so they wouldn't be recognized.
The entire article on Holy Week in Seville, Spain is well worth the read here.