Thanks! It goes through a central server so it can make it through corporate firewalls. This adds latency unfortunately but makes it more reliable for folks behind strange proxies and scales better for >2 users. But in any case, we'll enable P2P connections shortly so it won't go through the server if it doesn't have to, stay tuned. Sign up on our website and we'll let you know once it's out.
If you haven't already, you might consider adding end-to-end encryption, which will make people more comfortable with it going through your servers in the cases where it still needs to.
Also, I'd assume you use video compression; keep in mind that encrypted video still reveals some information through sizes, especially if you have some idea of the kinds of applications users typically use.
