I've built Featured Video Plus into a theme, works awesome! I'm also adding Schema.org markup to my templates, so I'm currently looking how to add:
<meta itemprop="embedURL" content="https://www.youtube.com/videourl" />
This is just for the sake of better Micro Data, I currently have the thumbnail registering, its awesome, but what also would be very cool is to fetch the transcripts or duration, or any other API's that youtube has available.
Thank You for this amazing plugin. I will send a contribution very soon.