... via Guy Kawasaki, veotag is a product which allows you to add clickable (and even better... SEARCHABLE ie Search engine searchable) links to content in your videos. For example you can set up links to each scene of a movie... or parts of a speech/presentation you recorded.
Talking about presentations, you can also incorporate your slides with the video... or you can just create links to sections of a audio only file. SWEEEET!
Here are two examples... both Guy Kawasaki, and both presentations I recommend everyone to have a look at.
Hmmm... I have a few of my presentations on file which are dying for this kind of treatment. And then there is every corporate annual general meeting, keynote addresses, training materials etc.