Watch HBO Channel Free Online Live Stream.Watch HBO HD Online Free. Watch HBO Movies Channel free on Internet. HBO (Home Box Office) is an American premium cable television network, owned by Time Warner, under the operating subsidiary Home Box Office Inc. As of January 2012, HBO's programming reaches 29 million subscribers in the United States, making it the second largest premium network in the United States. In addition to its U.S. subscriber base, HBO also broadcasts in at least 151 countries worldwide. HBO's shows consists primarily of theatrically released motion pictures and original series, along with made-for-cable movies and documentaries, boxing matches, and occasional stand-up comedy and concert specials.