Greetings, Marcia! My name is Arif, and I will assist you today.
I'm sorry to hear that you're facing this issue. Have you checked if the camera works with other apps or if it works fine when you open the Camera app?
If yes, please confirm the camera selection in Zoom:
During a Zoom meeting, click the arrow next to the “Start/Stop Video” button.
Select “Video Settings.”
If your device has multiple cameras, choose the desired webcam from the drop-down menu.
Troubleshooting camera issues during a meeting:
https://support.zoom.com/hc/en/article?id=zm_kb...
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
Warm Regards,
Arif