register an account. You might want a screen recorder e.g.
Hypercam
Camtasia
BSR screen recorder
do your video and save it as a .mp4, .avi or .wmv. You can edit the video you created in Windows Movie Maker and add effects and speed up the vid if you want. when you've done that, go to youtube and sign onto your account then click the button that says 'Upload Video'. Here is a direct link:
http://www.youtube.com/my_videos_upload
When you have successfully entered that page, click 'browse' and browse for your video. When you have selected it, either click ok or double click it. Now just enter the video title, description, tags and stuff. When you've done that, wait for the video to upload. you will know this when the progressbar is full and when it tells you to save changes

Now wait for your video to fully process(it usually takes around 5-10 minutes). When you've done that, go to your videos and you should be able to see the movie you made.
hope this helped