SopCast is P2P based program which will convert your computer into a real TV station.
Thanks to SopCast you'll be able to stream video from the folder you desire. Other users using it will be able to access the content you'll broadcast so you'll experience the feeling of a TV Channel owner. Take into account that SopCast support a lot of file formats: ASF, WMV, RM, Mp3, SPL,...
As long as it is based on P2P technology, the quality will increase according to the number of viewers of a a channel at that moment. If there are a lot of viewers the quality will be better and viceversa.
Of course, if you are going to broadcast your own channel, you'll be able to make it known by the rest of users at the Official Site, insert it into a category and decide if it will be public or private.
Not only does SopCast send the signal but it also lets you receive the signal of the channels other users are broadcasting. If you want to watch TV, just click on the channel you want to watch and enjoy yourself.
Maybe the most important feature of SopCast is that it is very easy to use, you won't have to configure anything, forget about COM ports and all that stuff, just run it and enjoy P2P TV.