Nov 6th, 2014
"It uses the FitVids.js library for fluid width video embeds (e.g. flash video in <iframe>s). You don't need it for pure HTML5 videos.
"It supports YouTube, Vimeo, Blip.tv and Kickstarter by default, and can use it with other video providers like Dailymotion or Viddler."
An alternative is to use Bootstrap's responsive embed feature: http://getbootstrap.com/components/#responsive-embed