Warner Bros has announced that it is inflicting testing a new format on select iPhone users in the US: HBO Max Shorts. Once the tool has suggested these clips, HBO Max editors decide which best represent the stories viewers love [and the] clips are then rendered in a new vertical video experience to ensure seamless playback. Warner Bros says that it’s currently being tested with a limited number of US iPhone users, but appears to have already made the decision that it will be rolled out across other devices and markets. Breaking news for Warner Bros: phones can be held horizontally as well as vertically. Image: Warner Bros