Did you follow the instructions?
Basically at a high level it goes like this:
1. You need a program to push the video feed out as a stream. You can do this with a number of programs. I would use VLC's built in streaming function to do this, because that's what I know. It allows you to change the bitrate, codecs etc.
2. Your pc is going to be "hidden" from the internet by your ADSL router. To "unhide" it, you need to set up port forwarding on your ADSL router. You do this for the port that you are streaming on. So using VLC as an example, I can ask it to stream on port 9999 if I chose to. I would then need to tell the ADSL router to push all incoming connections on port 9999 to my pc. This is called port forwarding, and you will need to log into your router to do it.
3. Your IP address from your ISP changes regularly, so if you get your iPad connected to your router (using your router's internet IP address assigned by your ISP), you might not be able to connect to it in a few days if the ISP assigns you a different one. For this reason you can use a company like no-ip or dyndns to set up a static address like "myrandomservername.no-ip.com". You then set up a small piece of software on your computer that keeps on pinging the no-ip website, telling it what the IP address is. This way, if the ISP assigns you a new IP address, when your iPad tries to connect, np-ip or dyndns will forward your iPad to the correct internet address, thus reaching your router... which will forward your request to your laptop using its port forwarding.
I hope this makes sense.
I haven't looked around, but there may be software that takes care of most of this for you. I know when I set up my Opera browser, it comes with a built in file server and messaging board and file sharing thing, and that automatically sets up port forwarding on the router (using special tricks which I won't go into here as it is out of scope). It does still require you to have an account with opera in order to get the dynamic IP stuff sorted out. This doesn't stream a webcam, but i'm using it as an example of software that can do this kind of stuff. I don't know if any video streaming software does.
EDIT: Took so long to type that out... that you've got it sorted already
Perhaps the post helps someone else out then.
But it seems alright