nextgenthemes/advanced-responsive-video-embedder — pull request #4 by cubicuboctahedron (2014-02-11 17:15:16+00:00)
Title: Added transients for video thumbnails.

Hello!
I indeed liked your WP plugin, but there was an issue with thumbnails - page with 10+ videos (in fake thumbnail mode) take 10 seconds to load. So I used WP transients to cache them and got 10x speedup.
Though, tested it only with vimeo.