Old browser options?
Chrome Frame is no longer supported, so that is not a good solution.
I completely agree that WebRTC is the current trend. However, there are still a number of WikiEducator users using IE, and it would be ideal to find a solution that does not leave them behind.
I agree to that fact, but with the all the goodies that WebRTC brings, they do not have legacy browser support. But with all that webRTC has to offer I guess upgrading to a modern browser would not be a bad choice. An other lovely usecase : I saw that wikiEducator uses a proprietary tool for video conferencing, using WebRTC we can build a lovely p2p conferencing tool. Again it is a toughie, but I would not mind adding this in the project scope( or atleast completing a major part )
While we do use G+ Hangouts for most of our video conferences, we also have a WebRTC conferencing tool embedded right in the wiki using the TogetherJS library. Enable the CollabOERate feature on the Gadgets page of your preferences.