That isn't a problem except that your broadband service is not symmetrical. Most broadband connections are in the < 400kbps range. So that means basically you can only broadcast to one or two people without a dedicated server in a data room someplace. Or you can find a stream host.
When you set up the ip for the broadcast don't use 127.0.0.1 or localhost for the IP. Run ipconfig at a command prompt and use the Class C (192.168.0.10? ) that it tells you.
I see you use ntl. They currently only offer 3mbit according to their site, and iirc thats only something like 400kbit upstream. Assuming you were streaming at ~150kbit, you could maybe support two viewers, and the video quality would suck probably.
Remember, when it comes to streaming it's upstream that matters. Downstream means jack shit. Plus with most ISPs running a server on a residential connectiopn is a violation of their acceptable use poilicy, might want to check and make sure your ISP allows it.