Unlike Web page delivery, these streaming videos hog a channel for as long as the video runs. Not a good situation. Net congestion will keep the Net alive. People will attempt to view the video, and they won't be able to because of the congestion. I have trouble getting RealAudio feeds from various parts of the world all the time.
Nobody wants to watch the video alone.
If one person can get the video feed, then others will huddle around that person like dogs on the tundra. This will conserve bandwidth just as the dogs conserve heat. It's a natural phenomenon. Many companies will put strict edicts on Net usage today. Any video stream will be monitored.