Videos of meetings recorded on MacOS with Screen Sharing do not match the view during meeting

Hello,

I've been working as a legal videographer recording depositions remotely over zoom.

For purposes of the deposition video, I have the witness pinned for the duration of the meeting. According to other people that I work with, on their systems (generally Windows) when one of the lawyers initiates a screen share, they adjust slider to make the witness take up about 1/3rd of the screen. Their recorded videos generally reflect what was on screen during the meeting.

I am using a MacBook Pro and a Mac mini - both systems when the screen sharing starts I drag the slider to about midway through the screen. When I view the recorded file, the witness starts out as a VERY small thumbnail and no matter how far I drag the slider their video in the recording takes up about 1/5th of the screen. I would really like to figure out a way to make the final video look like my screen during the meeting without having to use 3rd party software to record the window.

Any help greatly appreciated.