If you have on page video (video player embedded on page) running on your content, Nudge will usually pick this up automatically and count on page plays of the video.
All you need to have for this to be tracking is the full nudge tracking JS added to the page.
Nudge will then automatically track plays for videos embedded using any of the following players.
If you are using Brightcove player for your video, Nudge to track this too by using the Nudge Brightcove player plug in. Please see here for more details on setting that up.