Choppy Footage With Iphone App

I hope you won't mind going to Youtube and Looking at my Video that is about the cheapest guitar to help(I cant post Url in here I guess) Channel Is Searching For Tone- I NEED HELP(More ways than one )

In the very beginning and about the 5 minute mark the video becomes very choppy. The beginning is cut from about the same time as the 5 min mark. What can be causing this?

it is in the raw footage too not caused by editor

[Peter Chamberlain]

You can put a URL here but put a space in the path so the forum doesnt see a URL, but humans can!

This is the video:

I don’t know what’s causing the problem, which is quite noticeable around 5:10 or so.

Is this a one-off problem?

Dropped frames? What phone and codec are you using? Are you recording to your phone or to external storage? Did you get a warning as you were recording?