Actually, I haven't abandoned it--literally working on it this very minute, in fact. :)
The problem is that multi-platform video interchange is a hard problem. Very hard. SIP only gets you so far even with web RTC, then you hit issues where server X doesn't like delegating authentication to anything else, Y does but requires super-indepth knowledge of the protocol, and Z may or may not but it's got so many modules it's hard to tell. Then there's the issue of needing some degree of call control so connections can be terminated for using too much time, which the hosted SIP services I looked at don't seem to allow. And, unfortunately, the hardest problem of the launch list is the one I need to get right, meaning I've spent months looking for a good, low-cost, cross-platform (desktop, Android and IOS) video exchange solution and have only recently found something that may work. It's possible that I've just used bad Google keywords or something, but none of the legacy SIP servers seem to like being plugged into a web app as opposed to managing everything themselves.
So, yeah, definitely not abandoned, I've just spent way more time than I liked finding a possibly good media server, plus continuing to earn money so I can keep the lights on and pay the rent. :) Hoping for a launch in the next couple months, assuming my current path pays off.
BTW, how the hell do you accessibly (I.e. via the keyboard) click the button to submit comments here? :P I have to poke around on my touchscreen until I find it, then double-tap. Surely there's a better way?