[kijin]

I guess they could do without the registration part if the demo only involved streaming your own video back to the same device. But the primary use case seems to be streaming from one private device to another (not broadcasting to the world), and for that they need a way to determine which devices are allowed to access which streams.

In most web frameworks, accepting signups and associating sessions with user accounts is the safest and easiest way to achieve this.

[throwaway35784]

Or start the camera on the current device, show a code, enter that code on another viewing device.