Apdev recently released a new version of their AS3 open source Video Player. It features simple playlist support, loop function, full-browser, and dynamic resizing. Screen shot below:
If you have a strong stomach and are interested in viewing it live in a recent project of mine for a podiatrist, head on over to: www.4finefeet.com/surgical-videos.html
Pick up the source code below:
http://code.google.com/p/apdev-videoplayer/
On a related note check out an open source mp3 Flash Player mentioned in a previous post.