Like many of you, I have been reading and hearing a lot about how folks in the U.S these days, particularly younger ones, are using their computers to watch a lot of their video, including shows that they used to watch on their TVs. I am sure that this is true. I know a lot of folks who regularly use services like YouTube, Hulu and Boxee. I know even more folks who tell me that their children are watching a lot of video that way. However, I have always wondered whether actual Web video viewing patterns actually matched up to …