HBO MAX lets you watch movies, exclusive tv shows and other videos at one place but it only works when it is activated. hbomax.com/tvsignin is a stand- alone streaming platForm that bundles all of HBO together with even more TV favorites, blockbuster movies, and new Max Originals for everyone. HBO Max is an American subScription-based video on demand service owned by AT&T's Warner Media, through its Warner Media Direct subsidiary. hbomax/tvsignin is an American OTT video streaming system that gives films, television shows, and sports on consumer demand. Out of all the TV providers that are offering the best of HBO Max to their customers who already have an HBO subScription, they can choose from AT&T TV, Cox, DirecTV, Hulu, Optimum, Spectrum, Verizon Fios, and Comcast Xfinity.