Secure video chat program as an alternative to Skype [closed]
Why not use Windows Live Messenger video chat? Or if you want to go really techy and secury you can install your own SIP proxy and with the above mentioned VPN and a variety of SIP clients you can make your own platform, so to speak.
Jitsi looks like it fits your criteria.
It's free, open-source, uses encryption, supports most formats (SIP, XMPP). Check it out to see if it suits you.