Hi
we may be should have camper as a frontend of bigluebutton
bigbluebutton is also open source and integrates with a lot other LMS.
The recent 2.2. version needs on client site only a HTML5 browser.
https://bigbluebutton.org/
https://docs.bigbluebutton.org/2.2/install.html#bbb-installsh
For testing see
http://test.bigbluebutton.org/