Why won't facebook video chat http://apps.facebook.com/webcamroulette work when I'm at school?

[Jolie Cinnamon]

I've used that app before just fine from a college campus. I think those types of chat apps use Adobe Stratus, which is a peer-to-peer (p2p) connection formed directly between two people, instead of being routed through the server.

The reason the app uses a p2p connection is to save server bandwidth. That being said, many institutions firewalls would prevent connections like this, and since your computer works normally at home, I would think its a firewall issue. You should look into a VPN or just save the chatting for when you get home!

To test your connection's ability to use Adobe stratus, see http://cc.rtmfp.net/