Blip.tv now has engagement tools built in so you can see how long your viewers watch your videos.
This is very interesting because you can see exactly where you loose viewers. This will help you produce more engaging content.
In this example 50% of viewers stay with the video almost the whole way. They drop off when Adam and I say thanks for watching and then roll the final credits.
Video: Kodak Zi8 Entry Level Mic Tests
getseen.ning.com/profiles/blogs/kodak-zi8-entry-level-mic