Almer Blank put this tutorial out awhile ago: http://www.adobe.com/devnet/flash/articles/video_osmf/popup08.html
It depicts how to determine if a video has reached the end. It looks like the TraitEvent doesn't exist anymore. Is there a listener to can attach to the MediaPlayer to determine when the video has played out its entire duration?
Duh! Problem Resolved.
I overlooked this previously cuz I thought it said TimerEvent...