Mastering the Vim Languages
Chris Toomey give a talk on vim language. If you wanna learn why vim is so great or use vim more efficiently, you should start with this one. Chris also includes lots of resources in this talk if you want to follow deeply into this topic.
Let Vim Do The Typing
Presented by George Brocklehurst, talking about vim completing, basically. I found the talk very practically useful and somewhat different form Toomey’s talk.