EpocCam doesn't provide a recording function. You can use third party applications for recording.
In Windows, we recommend Windows Camera Application.
1) Choose EpocCam as Camera source. The name might be different (Sometimes it shows “Main Camera” not EpocCam). EpocCam is the one that has a white circle circling with a black background.
2) Once you see the white circle, start EpocCam on your phone.
Now you are ready to record video. Please use the recording function of the Windows Camera application.
In macOS, we recommend QuickTime Player. Choose "EpocCam" for Camera.