Earlier this week, Hulu announced decisions to pull out of TV.com and Boxee. According to sources close to the company, Hulu’s managers were motivated by very different reasons in each case. Regardless of the reasons, these announcements deliver a blow to online video. Another potential blow came yesterday when we heard how cable companies are fighting to limit online content. Hulu has more than 100 content providers, but some don’t want their content on Hulu. In the case of Boxee, Hulu executives asked Boxee