video chat in Unity

Is there any good way to have video chat in Unity3d?
We try to use this Unity Asset Store - The Best Assets for Game Making
But the quality is terrible, voice cannot hear clearly, sometime cannot connect to device

This is the only i got from the unity forum.

http://forum.unity3d.com/threads/136322-Videochat

this is same what you put your post. I think we need to optimize the code for our-self.

Hope you already see this video:
http://www.youtube.com/watch?v=ik5yOKbLB9E