Lost in all the conversation about the post format “shuffle” in WordPress 3.6 was the addition of MediaElement.js to core, an incredibly elegant, light weight media player for video and audio assets.
MediaElement.js is an HTML5 video and audio player that falls back to Flash on unsupported devices. It can be easily skinned, and has a nice little JavaScript API to control its behavior (say, auto playing a video when the visitor switches to a tab or scrolls down to a certain point on the page).
If you’re still using a third party video player like JW Player, want to jazz up your product site with some local video, or just skin the native video player to fit your theme, this talk is for you!