iirc zoom has some features like annotation that only work over a "screenshare" as it understands them, and not on other surfaces. it's possible to go one step

iirc zoom has some features like annotation that only work over a "screenshare" as it understands them, and not on other surfaces. it's possible to go one step further with OBS, take your capture camera and open a "windowed projector" and just share that window with zoom. then you have a window with a view manipulable from within OBS but zoom understands it as a screen capture too.