Content streaming systems, such as systems that use HTTP compliant requests to obtain media segments for presentation of the content on a device. These content streaming systems can be optimized to reduce latency to a low level so that live events can be streamed to receiving devices in such a manner so that the time between an action in the live event and the presentation of the action on a receiving device that receives the streamed content is less than about 10 seconds. A client device can use rendition reports to tune-in to a new rendition (at a first bit rate) after presenting a prior rendition (of a second bit rate) when switching between the different bit rates; also, for example, a client device can use playlist annotations that indicate independent frames to avoid downloading depending frame media segments when switching between different renditions.