An apparatus comprising means for: enabling user-selection of a first sub-set of available mediated reality content based on a current point of view of a user; throughout a first period of time, causing rendering of the selected first sub-set of available mediated reality content to the user as it is selected; throughout the first period of time, storing a second sub-set of the available mediated reality content for potential future rendering, wherein the second sub-set is different to the first sub-set being rendered to the user and is not being rendered to the user during the first period of time; during at least a latter portion of the first period of time, determining whether or not to augment the user-selected first sub-set of available mediated reality content to include an alert concerning the second sub-set of available mediated reality content.