If EpocCam is not show as a webcam in other applications, then please follow these steps:
1) After installing the drivers for EpocCam, you will have to restart all webcam-enabled applications before EpocCam is visible to them. Alternatively you can reboot your computer.
2) Starting with macOS 10.14 Mojave, Apple has stopped supporting third party webcams in Apple applications like FaceTime, Safari and Photo Booth. There is no current workaround for this.