Hello,
Google recently imposed HTTPS requirements for using WebRTC, which is the technology used for the communication of video and audio. I believe we are dealing with another issue right now where a client is still HTTPS and it doesn't work. We are trying to find the cause of that issue, however, the lack of HTTPS will definitely prevent it from working, so this is the first thing to check.
Matt Petty
Senior Software Developer
SmarterTools Inc.
www.smartertools.com