Mostly, it doesn't matter. There are utilities in other threads to change the frame-rate as it's 'just a number'. (1000frames per second record is still 1000 frames, regardless of if you play back at 30 or 60fps, just at 30fps it's twice as slow than at 60). Your final framerate of your edited video is what will set the actual speed.
I tend to save and edit in 30fps just to make the footage last longer and because I can't tell the difference, plus speeding up or slowing down is easy to do in the editor and I record everything at that.
However experienced youtubers who have experience may have a different view because of something I just haven't encountered yet.