ZOOM Recording isn't full screen

[Tamara10]

Hi,

I want to record a video of myself (without meeting participants).
I have a very sharp webcam, but the recording is still of poor quality.

If I then select "HD" in settings, a very wide black border appears around the recording. And the recorded video itself is sharp, but very small visible.

How can I make a recording in HD without getting a black border around it?