A regular discussion on this and other forums is about the "p" vs the "i". The video is processed by something to get raw data to the eye. It may be a TV, computer screen or iPhone. The processors in the various devices will vary. On my best display with a great processor, a 55" Sony LED TV, my 67 year old eyes do not see a difference between "i" and "p" video, unless there is brisk motion. I know the difference is there, I just can't see it.
If I am after stop action/freeze frame still frame captures of my stellar granddaughter trying to knock the skin of a softball, the "p" version is vastly superior.
Since storage is cheap enough and my computer strong enough, I leave my cameras in the 1080p60 setting unless I have a reason to dumb it down. On my older, slower computer I frequently shot in an "i" mode because editing previews were smoother.