Thanks!
The reason I'm asking is that a GLAM institution asked me how can they check how many of the images they upload are actually viewed, and they are interested in both file description page views and Multimedia Viewer views, which makes a lot of sense.
Do you have an idea where can they get it? The mediacounts page, to which you linked l, doesn't make it entirely clear where can one get it publicly, but maybe I'm missing something.
I'd actually say that it should be included in the same dataset as the usual pageviews, perhaps with some properties that indicate a different medium, because most people who upload images and want to know how often are they used, probably want to get info about all pageviews.