Sure @techapj can you look into how difficult this would be? Not sure if Oneboxer being an external gem (I kind of regret this tbh) complicates matters.
Related: I looked at Google tag manager recently and saw the following;
Published on 8 Sep 2015In this weeks video we’ll look at how to track Embedded YouTube Videos with Google Tag Manager. We can do this by implementing a custom HTML tag which listens for the interactions on the video. This allows us to monitor events such as a user only watching 25% or 75% of the video, as well as how many times they hit play or pause. We can then visualise this data in Google Analytics. Please see our first link if you want the written tutorial used in the video, enjoy!
This is fairly complicated and quite minor since majority of people just play inline. count of plays would be way more interesting but that is even more complicated.
Wenn Nutzer ihre Embeds falsch eingerichtet haben und einen Link zu einem Video hinterlassen, weichen die Zahlen manchmal stark voneinander ab. Das ist für meine Nutzer ein sehr guter Indikator dafür, ob Inhalte beliebt oder unbeliebt sind – und diese Information geht verloren, wenn man nur die Vorschau sehen kann.