Starting Version 76.0.3809.87, Google Chrome for macOS has had some changes that prevent ManyCam and other apps from appearing on the list of webcam options. This has particularly affected the iTutorGroup platform (on macOS) since it works with Google Chrome only. The Google team has already fixed this issue in Google Chrome Canary, however, this fix has not been officially released yet.
Download and install Google Chrome Canary if you don’t see ManyCam Virtual Webcam on the list of video sources on your platform.