Past Event Watchers make it possible to re-watch past cutscenes that you have seen in that zone. These are similar to the Goblin Footprints that can be found through Vana'diel. Where Goblin Footprints are found in enemy territory, Past Event Watchers are found in towns.
In some locations, a second Melody Minstrel has been added due to the increase in cutscenes available to view in the area. These Melody Minstrels are dressed differently.
To watch a past scene, just talk to Past Event Watcher NPC. A list of the available past events will be listed for you to choose from. It will cost 10 gil to watch a past scene.