Video doesn't work

Hi.

I'm a Technical support specialist in an outsource company.

Our customer has a problem. 

Video doesn't work in the Zoom application.  He sees the camera in the settings of Zoom, but there is only a white screen.

The problem is only with zoom. In the "camera" application, Microsoft Teams or in web (with browser) all work.

I checked Windows settings - Zoom has access to the camera. The application indicates the camera but there is no picture.  I also uninstall and reinstall the application 3-4 times. It doesn't help.

type of computer - desktop

OS - Windows 10 

app version - the latest (from the official website)