lrsjng/h5ai — pull request #235 by CrazyMonster (2013-11-23 16:11:48+00:00)
Title: Added simple video preview that uses the HTML5 <video> tag

Unfortunately it only works with the (rather limited) number of video formats that browser vendors chose to support (the only exception AFAIK is Safari that is able to play every format supported by QuickTime, which can be extended with plugins).