This guy has created some straight forward screen casts on how to modify and make things in DocuWiki
DokuWiki Beginners Screencast #1
This first screencast starts where every beginner starts and explains how to create your first page in Dokuwiki.
DokuWiki Beginners Screencast #2
This screencast explains how to add links to your pages and how they are used to create new pages in your wiki. The video is hosted at dotSub again, and I invite you to translate the subtitles to your language.