As a new player, running through the Praetorium dungeon was the worst

[Vamelo]

If you pay attention closely (or not so closely) you'll see that final sequence is just a dog and pony show more for having a spectacular experience than to challenge your acquired FFXIV skills. For instance (you may have noticed) in the one going after the Ultima Weapon, some of the bosses die still with plenty left on their health bars.

The video clips are part of the show. Should one be expecting the usual "dungeon" (I hate that word - instance) experience then of course it's disconcerting, so the vets I've played with are quite helpful in orienting noobs. Of course, this far into the game one knows to hit ESC to kill the video clip.

The clips end up in your library and can be viewed at leisure later.