Video Conference question(s)

I am looking to implement video conference using asterisk and 1VideoConference web solutions.
i wanted to know if you can run it under these settings.
unicast direct sreatming trought a deticated server(none peer to peer) video calls.
these settings are very important due to security reasons.

AFAIK- you will need to make sure their system supports SIP. If it can video conference over SIP, then it should work. Including user-to-server (no reinvites).