Changing Webcam Feed from EpocCam to Built-In Webcam
See https://www.kinoni.com/support-and-instructions/#Uninstallation for details on how to uninstall EpocCam.

Run provided uninstall script from Terminal:
sudo /Library/CoreMediaIO/Plug-Ins/DAL/EpocCamPlugIn.plugin/Contents/Resources/uninst.sh

If the script does not work you can also type the following commands
in Terminal:
launchctl unload /Library/LaunchAgents/com.kinoni.epoccam.daemon.plist
sudo launchctl stop com.kinoni.epoccam.daemon 
sudo launchctl remove com.kinoni.epoccam.daemon
sudo rm -r /Library/LaunchAgents/com.kinoni.epoccam.daemon.plist
sudo rm -r /Library/Audio/Plug-Ins/HAL/VirtualMic.driver
sudo rm -r /Library/CoreMediaIO/Plug-Ins/DAL/EpocCamPlugin.plugin