I’m a big fan of TED and what they do online with their videos from their events. They just released a new tool that allows anyone to build an online lesson using web video. You can select a video and video and create questions, quizes or give links for people to dig deeper.
I could see using this as a quick training to send out to volunteers, student leaders, or even to get kids thinking about a topic before they come to small group, sunday school, Wednesday night, or what ever other gatherings you have. I know a lot of educators are big fans of having the lecture portion of teaching done independently before a student comes to class so that class can be about discussion and unpacking the material. This is a tool that allows you to do that.
To learn more, visit Ed.TED.com. Also did I mention the service is FREE?