YouTube would be quite handy however. When you make annotations to the video, you can also define a "pause" time the video should stop playing (look at the top left corner to see that small "clock" counting down during the video). So by carefully considering how much time isneeded to read the instructions, you can create quite well understandable tutorials even when taking the screen capture, you work at the pace as you usually do.
YouTube - Creating a Face-me component in SketchUp
[flash=480,385:flsxlydr]http://www.youtube.com/v/VvI6A7Njw4k?fs=1&hl=en_US[/flash:flsxlydr]