how to get the duration of a video(length) on its thumbnail

its a very good plugin. i have already used that with 3 themes. no problem . all are automatic.

point is can you please make a little adding some code for pulling the duration display on thumbnail from the youtube, as like youtube ? because at the frontend/ front page / homepage, whatever the style is, viewers will be more attracted if the duration shows on there.
or any other idea for showing the duration..

thank you so much..

https://www.ads-software.com/plugins/video-thumbnails/