Re: feel the quality
The carriers are quite large, and that's quite a wide-angled lens to get the whole deck in view.
At a guesstimate, the camera (on one of the islands) was probably 80-100metres from the start of the ramp. Even a modern 4K camera isn't going to give great amounts of detail when wide-angled over such a huge area.
Combine that with the quality of the monitor (probably not as good as the actual camera) and then filming on a phone and it's not going to look great.
The purpose is to see what's happening on deck. Provided it's "good enough" to distinguish people (and possibly arm signals) then you don't need to be able to lip-read conversations.