HBO is joining the trial run of Comcast’s “On Demand Online” service, which will allow subscribers to watch cable programming online as long as it is part of their cable packages, B&C reports.

HBO, and its sibling service, Cinemax, will provide about 750 hours of programming a month for the trial, including series such as “True Blood” and “The Sopranos,” hit movies, and family programming.

—Elizabeth Jensen