You're all doing it wrong.
1. Take a demo of you playing
2. Play the demo and record it with Fraps or something similar.
3. Get into some video editing program like the Windows Movie Maker which comes with Windows XP.
4. Get the video fraps output'd into the program.
5. Put sound, effects or other stuff under it, depends on your knowledge of the program, which propabely isn't that high anyway so I know I can as well **** this one.
6. Export it as a Media file (.wmv .avi etc...)
7. Go to youtube.
8. Make an account at youtube, be sure to make its name as dumb and as retarded as possible, something like megaslaughter_45926 so people don't think you'd have a brain.
9. Find the button that lets you upload a video
10. Select the movie you just made and upload it
11.
12. Profit!
Because if you record yourself while playing, you'll have about 2 fps and for some reason you don't deliver the awesome frags you want to.