Have you seen YouTube's video toolbox?

The short video tutorials in the Video Toolbox are intended for those uploading videos to YouTube, but the principles are the same for anyone getting started with digital video.

Videos include general information, sound, lighting, directing/producing, and post-production.

Many, but not all, are from Videomaker. Also check out Videomaker's YouTube channel, and Videomaker's tips and techniques on their website: http://www.videomaker.com/youtube/

Here's a short video on using a wheelchair as a camera dolly (and believe it or not, I've actually seen this one done in person before!)