Recording issue - black overlay of video

When I record my zoom session from my Mac 14-inch, 2023, there is a black overlay around the video. When my assistant records on her Mac 13-inch the overlay is gone. I suspect it might have to do with the size of my monitor since we both use the same account, with same settings. Anyone knows how can i solve this matter? If not, everyone knows how i can contact zoom to send the prints of the recording. Thank you in advance