Use webcam to record video
If you have a webcam built into or connected to your computer, you can record a webcam video on YouTube and upload it directly to the site.
How to record your video
Click the Record from webcam link on the upload page, or simply go to http://www.youtube.com/my_webcam to get started.
Select Allow if you're asked to permit YouTube to access your camera and microphone.
Preview and publish your video
After you've recorded the video, you can preview it by clicking the Play button.
Not happy with the video? No problem! Just click the Start over button below the video. When you're satisfied with the video, click the Upload button.