Webtv providers are available everywhere, but can you really use their services, no its too expensive for most website owners, is there any justofication for that cost ? no there is no.
Video hosting is provided by YouTube to anyone for free, the problem is that once you uploaded your content to Youtube its no longer solely yours. So many website owners that looks for independency are searching for a webTV / Video hosting provider and discover that, they do not understand a word of what they are been told, the cost is huge, and details are being hidden from them.
As an Expert in the field i have been consulting to many of these providers and heard the definition "Profit Center" many times. The profit center is exactly where your pocket is and does not need to be there. One way of doing this is saying "we have a special unique video compression method" by saying this they will glue their customer to their service (that means they will convert/compress your content).
The truth is that nobody have anything unique, everyone is using the same compression tools and techniques. However if you will believe this you will find yourself paying from the nose. If you will visit most providers sites you will immediately get the impression that they were absolutly not designed for you, they are technical, and sound like they were meant either to confuse the customer or to show the competitor how good they are.
The main problem with the WebTV companies is that they can break down the price to little pieces and make you a mik giving cow simply because you cannot tell one service from another. You don't know what you need, you don't have the tools to judge their cost or their quality of service, all you know is that its going to hurt your pocket badly.