1. Open Zoom and start the meeting. 

2. Open Vmix and click add input. 

3. Click NDI/ Desktop Capture > Local Desktop Capture > Choose Zoom Meeting or Zoom Meeting 2 > (Windows Capture method) WindowsGraphicCapture. Then Click Ok.

4. Click stream gear icon to input the stream key and RTMP and then click save and close. And you can start the stream with zoom through VMIX