Introduction to Blogging: a screencast on how to get started with Edublogs, choose a theme and write your first post.
Adding media to your blog: a screencast on how to add video to your blog and how to embed interactive media.
How to customise your sidebar. a screencast on how to activate plugins and add widgets, a blogroll, tags and categories.
The Edublogs User Guide also has many step by step instructions with screenshots.