We do have a help page specifically for affiliates here:
The "help" link under the Affiliates tab on our site links to that page, and our Affiliate Admin homepage also features a link to that. You could just link to that page, or adapt our help content to re-present on your own affiliate recruitment/info page.
We don't have any video tutorials, but I recently read that usability tests have shown that screenshots with step-by-step text instructions work better than videos for most people, and I'll be adding screenshots to our help pages as soon as our new HTML-based Admin interface goes live.
You might contact Andrew at EasyE-junkie.com, as he already has some video tutorials for E-junkie, so he might have one for affiliates already or would at least have a method for making tutorial videos sorted out already.