Jorge Castro has done a great job starting these video tutorials and I would like to help in producing a few myself. However, I'm not sure which topics would be good to cover.
How and when to Comment
It is common for new users to post comments that should be answers, and answers that should be comments. This video could also show how to directly reply (e.g @JohnDoe) to another user.
How to ask a question
I figure this is pretty straight forward - though I find myself more and more pointing users to the "Ask Question" button. Hopefully a video showing HOW to ask a question and more importantly describing how to ask GOOD questions will be more informative than the current little "Read this and accept" page.
Get moderators attention
While it's rare, occasionally posts need a moderators attention. How to do so, what the different topics and reasons are - in a video may help to release some confusion and help users know how to take action against posts.
- Close or Delete
- Migrate to another SE site
The @ symbol and other easter eggs
While some of the other Stack Exchange sites have an immediately comprehensible mailbox/reply icon, this invaluable place to track comments and replies was invisible to me until I accidentally clicked it instead of my name. I only wonder what else I'm missing out on.
Possibly also cover:
- @'ing people when commenting so they get a notification
Stack Exchange messages
It was a month after regular use of the site before I realised the little StackExchange button in the upper left was a button and was useful