Broadway - 9:21 pm on Jul 18, 2011 (gmt 0)
My opinion of the web is simply nobody reads anything. They may skim, but read, no.
A video, one that uses arrows and descriptive labels to animate the page's static images or actual animations of the process being described on the page, I think people will value that, especially the non-readers.
While I know 2/3rd's of the people viewing YouTube are just watching cat videos, YouTube is the second most popular search engine for some reason.
10 - 15 years ago people use to think if they found it on the web it must have some value and they read it, nowadays (especially with new generations of web surfers who grew up playing on-screen twitch games) I'd suggest it takes more than text to keep someone on page for a relatively generic topic.