I'm finalizing work on WP YouTube Lyte 1.4, with the following changes;
* new: if microdata is enabled, check if captions are available and if so add the accessibilityFeature=captions markup. Gracefully contributed by Benetech
* bugfix: widgets with youtu.be short URL's were broken
* bugfix: in some cases iframe size on mobile was not correct
* bugfix: mobile rotation handled more gracefully
If anyone is interested, the "beta" can be downloaded from http://downloads.wordpress.org/plugin/wp-youtube-lyte.zip. I am, as always, looking forward to your feedback!