https://bugs.winehq.org/show_bug.cgi?id=42945
--- Comment #2 from George Gibbs vash63@gmail.com --- I can also reproduce this, also occurs throughout the game whenever the legacy WMV3 (Windows Media Video 9) videos are used. These are located in the directory: FINAL FANTASY XIV Online/game/movie/ffxiv
Worth noting that there is now a free trial for this game that can be used to reproduce the bug, so no purchase is needed. Recommend updating the bug title to something like "FFXIV WMV3 Videos Hang Indefinitely" to make this easier to find.