I just use my digital camera that can take videos also. My camera is limited to 3 mins of video at a time. But a friend has one that will record 45 mins worth of video. With these little cameras you can just mount them to your handle bars. I have pictures of my mount on my blogg here at
Camera Mount Also here is what my handlebars look like with everything I put on them
Handlebars His camera has 1 gig of memory and that is fine. His videos are about 400meg in size. But the resolution for video is 320x420. Good enough for youtube.