For some reason, newer cameras (for me, the Sony RX100 IV) have this built-in 30 min limit to any video. The supposed explanation is that companies don't want the camera to get categorized as camcorders which get extra import tax, but it's crazy to think that the camera I had back in 2009 could do more video recording than any camera I could get today.
Luckily this is all software, and at least for the Sony cameras like the RX100, you can run this hack here that would remove the limit:
https://sony-pmca.appspot.com/plugin/app/com.github.ma1co.openmemories.tweakThe hack itself might be getting dated though as you need Internet Explorer to run it.
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