Answer:
It was to entertain the villagers with past stories. Griots would tell mythical stories of the gods and spirits of their region.They would also tell stories of kings and famous heroes from the past battles.
The event that occurred in the 4th Crusade was the Crusaders attacked Constantinople. The sack of Constantinopea took place in April 1204, during the 4th Crusade. The Crusaders attacked, destroyed and robbed during the assault of Constantinople. (Hope this helps! :)