Why is the video quality in Cadrage lower than usual?

If you compare the photo and video modes in the native iOS camera app, you will notice that video FOV is much narrower. We employ a custom means of capturing video to make use of the full FOV of your iPhone’s camera and to simulate wide lenses. Unfortunately, this results in lower resolution. However, when it comes to planning shots, we consider the ability to preview wide-angle lenses to be more beneficial than perfect image quality.