720p, recording at 60 fps, played back at 30 fps.
I believe in 24pn, “n” being the key, that you can actually see the effect in-camera. In that mode, it actually gives each frame it’s 1/24 of a second (creating that slow motion in camera).
I don’t know if that makes any sense to you. I’m still pretty knew with my HVX as well, and am still getting my head around all of the various frame rates.