Hey welcome to TSF, the flash video basics tutorials found here:
http://www.gotoandlearn.com/ will talk you through seeking to different parts of the video. Then it's just about modifying the code to seek when you click the button (rather than the bar at the bottom of the page)...
But yes this is definately possible, if you give it a go and have problems please post back here and we'll help you out =]
Cheers,
Jamey