Hello!
Did you get a GH5? If so, that's a great camera!
Anyway, I would set it to NTSC, film at 23.976 fps if you want real-time footage, 30p if you want 80% slow motion (a bit dreamy), and 60p when you want 40% slow motion. People rarely use 50p or 60p for real-time playback - it's used for slow motion.
