Run ManyCam, navigate to the Virtual Backgrounds tab, and enable Virtual Background as shown below.
![](https://help.manycam.com/wp-content/uploads/2020/10/image.png)
Then, either select Replace or Chroma key depending on your setup. Once done, select Custom background from the drop-down list as shown below.
![](https://help.manycam.com/wp-content/uploads/2020/10/image-1.png)
Lastly, select the video you want to use as your backdrop and press Open.
If you want to learn more about Virtual Backgrounds, check out this guide.