Nice to see the forums back up!
Came across this and thought it interesting:http://www.aviz.fr/dimp/
Not strictly flash although I understand it uses flv videos of sorts.
The guys behind it term it 'direct manipulation', it seems it analyzes the difference between I and P frames and calculates the trajectories that objects follow through the video's timeline, allowing the user to drag the individual elements across their perceived trajectory. Pretty impressive stuff from a HCI viewpoint although I imagine the level of interactivity if contingent upon the number of keyframes the flv is encoded with
Not sure how you'd achieve a similar effect in Flash, perhaps using the BitmapData api to analyze the video. I know of one example on devnet utilizing it for webcam motion detection under FCS: http://www.adobe.com/devnet/flash/artic ... otion.html