Match intro movie with where you are in the game

[Enkidoh]

Indeed, ignore most of SHB's opening movie, much of what is shown doesn't actually have any actual bearing to what happens during the expansion or before (and the reasons why become apparent during SHB), and what that is shown does happen... isn't even that true to how the game depicted it - it was mostly for coolness and to fanservice reference the game's origins (given the Crystarium's design is meant to emulate the area shown in the very earliest tech demo for FFXIV version 1.0 called 'Rapture').

Really, the only opening movie that was a big spoiler was Heavensward's when that expansion was launched to those who hadn't yet finished ARR's storyline, as it showed (in a slightly altered way), the events that occurred at the end of ARR, not to mention something that was still to come at the time (the Dravanian Horde's final attack on Ishgard) which did not even occur in-game story wise til patch 3.3. Nowadays that isn't an issue anymore, but back then a lot of players were disappointed that such a cliffhanger ending was spoiled for them (the trailer version of it shown on Youtube before HW launched even had a spoiler disclaimer at the start).

So as Iscah above said, take what the opening movies show with a grain of salt, they're just to look cool and are not accurate representations of events you actually experience playing through the story as your character.