It occurred to me I should share the screenrs I did to explain how to customize my German drinking game template here - that was a challenge!
To learn about some basic best practices before recording them I referred to several of the resources David lists above (though didn't know he had them here - I googled to find them), and those helped quite a bit.
The biggest challenges were:
(1) Struggling to overcome the Java issues with Screenr. That took a lot of time and energy to resolve and was frustrating, but I figured it out.
(2) Timing them to come in under five minutes. You'll notice some mighty quick wrap-ups at the finishing line. :)
(3) Controlling audio quality.
(4) Not being able to do audio/video edits.
Only after I'd done these did I realize it wasn't necessary to do them in Screenr (which would have eliminated most of these issues) - and next time I'll use something else.
So here's my belated-yet-hard-won entry for this challenge. You can access the screenrs in this blog post about them:
http://www.jackievannice.com/?p=175064358