The quality difference is literally night and day compared to the Mac Book Pro webcam.
One advice would be not to mimic my setup on the right though, it was experimental at best, and certainly adds a certain level of stress.
Although 800kbps is not sufficient for regular HD content, it’s perfect for a simple webcam stream.
Last but not least, make sure the encoder uses a robust internet connection with sufficient bandwidth, at least twice as much as the actual bit rate.
The Live Streaming If you don’t have a budget to pay for your own CDN, services like USTREAM and Livestream provide the full infrastructure to deliver video content to your viewers.