https://support.ecamm.com/en/articles/3217019-uninstalling-iglasses
Uninstalling iGlasses | Ecamm Help Center
How to uninstall iGlasses from your Mac
uninstallinghelpcenter
https://support.ecamm.com/en/articles/3903822-iglasses-shows-only-black-screen
iGlasses Shows Only Black Screen | Ecamm Help Center
What to try if iGlasses is only showing black instead of camera video.
black screenshowshelpcenter