So sayeth Nielsen Media in a recent study.
Some quick numbers from the article:
only 15.8 percent of iPod users ever played any video content on their iPod or iTunes
only 1 percent of the content items played on an iPod or iTunes was video content
Unfortunately, the article doesn’t talk much about the demographics of the 400 iPod users they sampled. It would be interesting to run a similar study of college student iPod use where lecture videos were available via iTunes.