Oh, your talking about the last two dungeons. Yes. They are sadly a problem. To get people to run them, they reward end game currency so people run them otherwise the queues for them would be very long. The problem is that their cutscenes are way too long for mid dungeon. Even getting compensation, which they do, people tend to be impatient in waiting. I personally did watch the cutscenes but was locked out of most of the fights my first time through.

This is a design flaw that fortunately SE doesn't repeat. Its a problem and I found it frustrating too but the up side is SE seemed to learn from the issue and cutscenes tend to be far better arranged in latter content so you shouldn't find this as a problem going forward.

All the cutscenes are in the inn. There is a dropdown menu at the top of the interface that allows you to access cutscenes from different things. Most of the cutscenes from those two dungeons are actually listed under Duties.