How do you focus the video recorder on a Canon 500D?

Copied from the DPReview site. Auto focus during movie recording works in the same way that it does in normal live view mode, meaning that if it is activated in live view mode, it is available during movie recording (press the AF-ON button to focus). Since all sounds are recorded during movie recording, and any in-camera sound is magnified (including the aperture changing), using AF with the internal mic is not recommended, neither is using in-lens IS. You'll also pick up the clicks of the control dial if you change exposure compensation while recording. Unlike a conventional camcorder there's no continuous focus option, and to be honest the focus is so slow that you would never use it whilst filming. You can always use the manual focus on the lens using the focus ring. Not the ideal camera for video. Chris

When you're on video mode, you have to manually focus it. So on the back side, on the top right, you'll see 2 small black circular buttons side by side. I believe its the first one you have to press. It's a little difficult to get it right on so you'll have to play with it.