The 30 minute length limitation imposed by the EU is NOT the issue I am describing.
The Fuji is supposed to be able to record up to around 30 uninterrupted minutes onto a card, splitting that into roughly 5 minute files. What my camera is doing is not splitting the files in the recording process as it is supposed to but shutting off and stopping the recording after the first 5 minutes expires. It is NOT doing this when it is approaching the card being full, but in the middle of the card being full, around 64GB for the 128GB card. What's bizarre is that once it stops I can just start it up again and it records just fine from that point on. Of course I lose a vital few seconds because of this, not to mention my reputation and my cool, so it's not like this is any kind of a solution.
It died on me again today at a crucial moment, and makes me want to throw the camera in the garbage and buy another brand.