Use webcam to record video
The webcam capture feature will not be available on YouTube after January 16, 2016.
Previously, if you had a webcam built in or connected to your computer, you could record a webcam video on YouTube and upload it directly to the site. This feature will be turned off because it is rarely used and is built on technology that is no longer supported.
Alternatives to webcam capture
You can use software on your computer to record and save a webcam video, and then upload the video to YouTube. Popular software includes Photo Booth for Mac OS X and Camera for Windows 8+. If you have another OS, you may need to look up how to record videos using your webcam by referencing your device manual or searching online.
If you have an iOS or Android phone, you can record videos with your phone's camera and upload them with the YouTube app.