1. An apparatus comprising: a processing platform including a hardware processor; and a memory resource storing machine readable instructions to cause the hardware processor to: insert, by a reference frame manager, reference frames into media, the reference frames include a plurality of illumination points and present at a first frequency between media frames of the media, and wherein the illumination point comprises a shape that is a different color than a primary color of the reference frames; identify, by an image manager, images captured by a camera included on the processing platform, the images comprising reflections of the reference frames from a user; determine, by a gaze analyzer, a portion of the media that is being viewed by the user based the images of the reflections, and adjust a setting of the reference frames after each frame has been analyzed based on the portion of the media being viewed.