FaceTime video quality
What is the video quality of FaceTime on iPhone 5s?
iPhone 5s, iOS 10.3.1
Personally, I think the video quality of FaceTime is pretty good. I'm not sure exactly what you are after, but there are no real adjustments on the iPhone for this. I guess one factor would be whether you are using WI-FI or cellular data at the time and what the quality of those are,.