Operator11 and MITV (Make Internet TV) are two ways. You can produce your own video and turn it into subscribable (RSS) media with a few clicks. I really like MITV as it takes you step by step through the internet / video process. At the end of the post I will embed their intro video for you to get an idea of their philosophy.
They also have an active WIKI open to anyone to join - if you turn into a real junkie:
- The MITV Wiki is a library of information about publishing video on the internet.
- This site is a supplement to the Make Internet TV video producer's guide, which is the best starting point for most topics.