About eight years ago Jackob Nielsen's analysed TV vs. computers and came to the point that broadcast TV is a medium for relaxation, where the "user" sits back and becomes immersed in whatever the program directors decided to air.
Now in the days of video blogging and broadband web news he did the experiement again and got the same results: Eyetracking data show that users are easily distracted when watching video on websites, especially when the video shows a talking head and is optimized for broadcast rather than online viewing.
Jackob Nielsen: Talking-Head Video Is Boring Online
