An example method of rendering media content includes receiving, at a client application executing on a computing device, streaming media content. The method also includes identifying a plurality of tracks associated with the media content. The plurality of tracks includes a DOM track specifying one or more user interface (UI) events to execute at a set of time intervals, and the set of time intervals corresponds to a timeline in accordance with the streaming media content. The method further includes rendering the DOM track in accordance with the timeline of the streaming media content.