Welcome to our Video primer - or the "how to shoot video on Canon
HDSLR guide". Using the HDSLR as a video camera is easy, but mastering
it is a bit harder. It isn't exactly the same as using the simple Canon
Camcorder you've been using to capture the rug rats running around the
house. The HDSLR doesn't do the autofocus like your camcorder does and
it isn't a fixed focal length either. Most of the experts are
recommending you do manual focus "like the pros do" - there is a simple
focus technique you can use to start out your shot, but after you begin a
take, you'll have to make any focus adjustments manually.
A lot of this material comes from specific posts about the Canon
EOS 5D Mark II - however, in most cases, it now applies to all of the
Canon HDSLRs.
Get started by reading thru this page and watching this video from the Event Videographer's Resource Overview (almost a marketing piece from Canon) and then the videos that come in the first section: