JBEdit is an AJAX online video editor (based on jQuery), where the edit capabilities reside on server side. You can extract a selection and tag it. All the edit is done on MP4 videos via ffmpeg.
Online Youtube video downloader and converter for your server
Flash video web service in AS3, PHP5 and FFmpeg
Tsuka is a web site software package which has the ultimate goal to provide all means for publishing videos on a web site in Flash video format. Front end is written entirely in Actionscript 3, while back end uses Zend Framework, thus written in PHP 5.