Filesystem that records longer than 4 GiB, or one hour without interruption
In my experience, that's a indicator of the line between consumer, pro-sumer and professional cameras. At a previous workplace, it was problematic enough to justify investing in a better camera for the situation that could handle longer video lengths. 

Additionally, standard FPS for video are 24 or 30 fps. 

You might be able to save some time on the card by recording at 24 fps, but not enough to record for an hour by my calculations.