@Dougkennedy
The issue is most likely in regards to your camera driver on your machine. Please try reinstalling the video driver and test the camera in Zoom again.
Here is a link to a Microsoft support article on how to do this on your machine (assuming windows): https://support.microsoft.com/en-us/windows/update-drivers-in-windows-ec62f46c-ff14-c91d-eead-d7126d...
If the above doesn't work, you will want to visit the manufacturer's website for your camera for the right driver, or if it's a laptop you will want to visit the manufacturers website for your device.
You can follow the Microsoft link above for uninstalling the driver, and then use a newly downloaded driver from your manufacturer to reinstall before restarting.