Monitor YouTube Web Object complete

Hi folks. Has anyone figured out a way of being able to monitor if a YouTube video has been watched till the end (completed) if attached to a project via a web Object?

I have looked at the API parameters here: https://developers.google.com/youtube/player_parameters but to no avail.

I saw here years ago some javascript "magic" solution for JWPlayer but can't find it at all.

Does anyone have any helpful info? (Btw, it took me a while to figure out how to get, what I thought was an easy task, of having the YouTube video play - seems the HTTP link needs to be amended to HTTPS, and voila, it works. This shows my level of competence).