Make sure your computer meets the system requirements for Virtual Background. Prerequisites for video conferencing virtual backgrounds You can also use Virtual Background in a Zoom Room, or a simpler Mask Background feature in the web client.
You can upload your own images or videos as a virtual background, or use nothing and just blur the background instead. This feature works best with a physical green screen and uniform lighting to allow Zoom to detect the difference between you and your background, although a physical green screen is not required. The Virtual Background feature allows you to display an image or video as your background during a Zoom meeting.