Try T.A.G. Editor 2.0 for QuickTime by Digital Renaissance
It's a tool for adding interactivity and information to QuickTime movies, using a timeline editing interface; you can add URL launches, frame-specific hotspots, captions and more.
Company Information:
Digital Renaissance
Canada
Main Phone: +1 (416)5354222
Main Fax: +1 (416)5351201
Company URL:
http://tag.digital-ren.com/
Free download of the full version