If EpocCam is not show as a webcam in other applications, try the following troubleshooting steps.
Install the EpocCam Driver
For EpocCam to be recognized as a camera, the EpocCam driver must be installed in the computer. Here are the setup guides:
Restart the application
After installing the drivers for EpocCam, restart all webcam-enabled applications before EpocCam is visible to them.
Restart the computer
Restarting the computer can help resolve issues with EpocCam not showing up as a webcam in applications.
macOS 10.14 Mojave or newer
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.