At this time mediaviewer views of images (as opposed to preloads) are being sent to a specific beacon. Those requests look like this:
en.wikipedia.org /beacon/media ?duration=7063&uri=https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2Fa%2Fa3%2FCannon_Beach_At_Dusk.jpg%2F1920px-Cannon_Beach_At_Du
These requests should be reworked to be eventloging/eventgate ones so they can benefit from the event pipeline. To my knowledge at this time after being sent those requests are not stored/agreggated anywhere.