This changed in 2019 IIRC. The EU changed its regulation and the 30 minute record limit no longer applies. Furthermore, it was always possible to install custom firmware on many cameras that bypassed this limit. Record limits due to temperature and overheating, though, is a different story.
"Digital cameras that are only capable of recording still images remain classified in this subheading. Cameras of this subheading may also have video-capture capability to record continuous periods of video. However, when such apparatus are capable, using the maximum storage capacity, of capturing video in a quality of 800 x 600 pixels (or higher) at 23 frames per second (or higher) for a continuous period of at least 30 minutes (regardless of the fact that the captured video images may be recorded in separate files of a duration of less than 30 minutes) they are always to be classified in subheadings 8525 80 91 or 8525 80 99."
