YouTube has added a new "face blurring" feature that allows you to obscure faces in videos with just a click of a button.
This is especially useful for those taking videos in war zones or where human rights crimes are going on - cases where protecting one's identity could be a matter of life and death. But it can also be used if you want to upload a video of a youth sporting event. Whatever you need it for, it's an easy way to protect the privacy of those shown in YouTube videos.
Once you've chosen the video you'd like to edit, go to "Additional Features" and click "Apply" under "Blur All Faces." Couldn't be easier!