You can click/drag the video controls, the dots on the map and the map itselfto interact. (Mouse-over the video to view its controls)
I basically drove on a little road in Switzerland with the car last week, filmed it on a little camera and dumped the location (by second) coordinates in a text-file.
I made this little Flash app with CS3 (not Flex) to see what the new and very cool GoogleMap API for Flash was all about.
The video is on this server, although I did actually intend to use the Youtube API and chromeless player, but that player isn't available in AS3 yet.
I haven't bothered with any fancy streaming video technology, so be patient (24MB).
BTW, here are the (messy, dirty, frankly disgusting) source files: gdrive.as, gdrive.fla,P1020692-small.flv, positions.txt and map_flash_1_5.swc.