When participating, I see the participants, who can see me, but I can't see myself

Hi!

When participating in a meeting, I see the participants, who can see me, but I can't see myself.

I tought this was due to OBS Studio, but I did uninstall it and its video line in Zoom disappeared.

If I record on my computer, the record is correct, but the fact that I can't manage the scene. I want to pin a particular participant and not have participants who intervene (this is for demonstration of artwork).

I'd like toget back to a normal behaviour.

Thanks