You need to do a screen capture not a screenshot. Screen capture is when you make a recording of what happens on your screen. That you can do even with something like power point ( 2016 has this feature ).
This thumbnail is on a video already uploaded. The video itself is not performing but the thumb doesn't too.
Some data: 17.5K impressions, CTR for 13 days: 1.9%, CTR today: 3,4%
Your Ideas will be highly appreciated.