There is now a Nintex Forms 2013 installation walkthrough video up:
Similar to the Nintex Workflow 2013 installation video this is meant to act as a complement to the Nintex Forms 2013 Installation Guide (Installing Nintex Workflow 2013 and Nintex Forms 2013) and follows Nintex best practices. The walkthrough goes through the basics of getting Nintex Forms to a place where users can start building custom forms in the SharePoint environment.
I will be digging into Forms configurations (specifically with Nintex Live Forms) down the road, so please keep an eye out for an update here once that video is live.
If you have any suggestions for future videos please let me know! Hope this is helpful