The best solution I think would be to simply provide a way to break out of NPC conversations by pressing the cancel button twice, similar to the way it works when a cinematic is in progress.

The story line cinematics for The Praetorium and Castrum Meridianum are oddly located under "Duties" in the inn. And playing them back in the inn, they feel out of context, since you don't know how or where in the dungeon a cinematic was triggered or what you did that preceded it. Story line Lengthy event triggered cinematics do not belong multiplayer dungeons. When I first tried both of the dungeons, everybody rushed ahead when I tried to watch them. I got completely separated and felt forced to leave because it appeared I couldn't continue.